Isiah Kiner-Falefa

2BActive

Bats/Throws: R/RAge: 31Born: Honolulu, HI, United StatesDebut: Apr 10, 2018Draft: 2013

Isiah Kiner-Falefa is a second baseman for the Boston Red Sox. Kiner-Falefa was born on March 23, 1995 in Honolulu, HI, United States and debuted in the major leagues on April 10, 2018. Kiner-Falefa bats right and throws right. The Texas Rangers drafted Kiner-Falefa in 2013 (round 4, pick 130 overall) out of Mid-Pacific Institute. In 2026, Kiner-Falefa is batting .242 with 2 home runs, 16 RBI and an OPS of .633 in 66 games. MLBDB has 9 seasons of statistics for Kiner-Falefa, from 2018 to 2026.

HR22026 season

RBI162026 season

OPS.6332026 season

Seasons9Boston Red Sox

Hitting

9 seasons of hitting across 5 clubs. Club-specific splits are shown in lighter type.

Isiah Kiner-Falefa, season by season hittingRegular season, oldest first
Season	Team	G	PA	AB	R	H	2B	3B	HR	RBI	SB	BB	SO	AVG	OBP	SLG	OPS
2018TEX	TEXTexas	111	396	356	43	93	18	2	4	34	7	28	62	.261	.325	.357	.682
2019TEX	TEXTexas	65	222	202	23	48	12	1	1	21	3	14	49	.238	.299	.322	.620
2020TEX	TEXTexas	58	228	211	28	59	4	3	3	10	8	14	32	.280	.329	.370	.699
2021TEX	TEXTexas	158	677	635	74	172	25	3	8	53	20	28	90	.271	.312	.357	.670
2022NYY	NYYYankees	142	531	483	66	126	20	0	4	48	22	35	72	.261	.314	.327	.642
2023NYY	NYYYankees	115	361	326	39	79	12	1	6	37	14	28	70	.242	.306	.340	.646
2024All	All teams	133	496	465	53	125	18	4	8	43	11	16	78	.269	.306	.376	.683
2024TOR	TORToronto	83	281	257	32	75	8	2	7	33	3	13	37	.292	.338	.420	.758
2024PIT	PITPittsburgh	50	215	208	21	50	10	2	1	10	8	3	41	.240	.265	.322	.587
2025All	All teams	138	459	431	45	113	21	2	2	40	15	17	77	.262	.297	.334	.631
2025PIT	PITPittsburgh	119	428	401	40	106	20	2	1	35	15	17	69	.264	.300	.332	.632
2025TOR	TORToronto	19	31	30	5	7	1	0	1	5	0	0	8	.233	.258	.367	.625
2026BOS	BOSBoston	66	183	161	23	39	5	0	2	16	8	19	27	.242	.322	.311	.633

G: Games played in any role, including games spent only pitching or running the bases.
PA: Plate appearances. Completed turns at the plate, including walks, hit-by-pitches and sacrifices.
AB: At bats. Plate appearances that count toward batting average; walks, hit-by-pitches, sacrifices and catcher's interference are left out.
R: Runs scored.
H: Hits.
2B: Doubles.
3B: Triples.
HR: Home runs.
RBI: Runs batted in.
SB: Stolen bases.
BB: Walks, including intentional walks.
SO: Strikeouts.
AVG: Batting average. Formula: H ÷ AB.
OBP: On-base percentage. Formula: (H + BB + HBP) ÷ (AB + BB + HBP + SF).
SLG: Slugging percentage, total bases per at bat. Formula: TB ÷ AB.
OPS: On-base plus slugging. Formula: OBP + SLG.

Isiah Kiner-Falefa, expanded hitting by seasonRegular season, oldest first
Season	Team	1B	TB	CS	SB%	HBP	IBB	SH	SF	GIDP	GO/AO	LOB	AB/HR	BB/K
2018TEX	TEXTexas	69	127	5	58.3%	6	1	5	1	14	1.44	162	89.00	0.45
2019TEX	TEXTexas	34	65	0	100.0%	4	0	1	1	9	1.18	119	202.00	0.29
2020TEX	TEXTexas	49	78	5	61.5%	2	0	0	1	6	2.18	65	70.33	0.44
2021TEX	TEXTexas	136	227	5	80.0%	11	2	1	2	11	1.38	188	79.38	0.31
2022NYY	NYYYankees	102	158	4	84.6%	5	2	3	5	13	1.48	187	120.75	0.49
2023NYY	NYYYankees	60	111	5	73.7%	3	0	1	3	12	1.18	127	54.33	0.40
2024All	All teams	95	175	2	84.6%	10	0	3	2	12	1.01	175	58.13	0.21
2024TOR	TORToronto	58	108	1	75.0%	6	0	3	2	9	0.83	94	36.71	0.35
2024PIT	PITPittsburgh	37	67	1	88.9%	4	0	0	0	3	1.29	81	208.00	0.07
2025All	All teams	88	144	4	78.9%	5	0	5	1	9	1.84	184	215.50	0.22
2025PIT	PITPittsburgh	83	133	4	78.9%	4	0	5	1	9	1.80	173	401.00	0.25
2025TOR	TORToronto	5	11	0	N/A	1	0	0	0	0	2.75	11	30.00	0.00
2026BOS	BOSBoston	32	50	2	80.0%	0	0	3	0	3	1.18	85	80.50	0.70

1B: Singles. Formula: H − 2B − 3B − HR.
TB: Total bases from hits. Formula: 1B + 2 × 2B + 3 × 3B + 4 × HR.
CS: Times caught stealing.
SB%: Stolen-base success rate. Formula: 100 × SB ÷ (SB + CS).
HBP: Times hit by a pitch.
IBB: Intentional walks.
SH: Sacrifice bunts.
SF: Sacrifice flies.
GIDP: Times grounded into a double play.
GO/AO: Ground outs per air out. Air outs are outs on fly balls, line drives and popups. Formula: GO ÷ AO.
LOB: Left on base. Runners still on base when the batter made an out.
AB/HR: At bats per home run. Formula: AB ÷ HR.
BB/K: Walks per strikeout. Formula: BB ÷ SO.

Isiah Kiner-Falefa, advanced hitting by seasonRegular season, oldest first
Season	Team	PA	AB	ISO	BABIP	HR%	K%	BB%	wOBA	wRAA	wRC
2018TEX	TEXTexas	396	356	.096	.306	1.0%	15.7%	7.1%	.301	-4.5	41.8
2019TEX	TEXTexas	222	202	.084	.307	0.5%	22.1%	6.3%	.272	-9.1	18.8
2020TEX	TEXTexas	228	211	.090	.316	1.3%	14.0%	6.1%	.307	-2.4	26.1
2021TEX	TEXTexas	677	635	.087	.304	1.2%	13.3%	4.1%	.293	-11.9	70.0
2022NYY	NYYYankees	531	483	.066	.296	0.8%	13.6%	6.6%	.285	-10.5	50.1
2023NYY	NYYYankees	361	326	.098	.289	1.7%	19.4%	7.8%	.287	-9.4	34.6
2024All	All teams	496	465	.108	.307	1.6%	15.7%	3.2%	.299	-4.4	53.6
2024TOR	TORToronto	281	257	.128	.316	2.5%	13.2%	4.6%	.331	4.7	37.6
2024PIT	PITPittsburgh	215	208	.082	.295	0.5%	19.1%	1.4%	.257	-9.1	16.1
2025All	All teams	459	431	.072	.314	0.4%	16.8%	3.7%	.279	-12.8	41.4
2025PIT	PITPittsburgh	428	401	.067	.316	0.2%	16.1%	4.0%	.279	-11.8	38.7
2025TOR	TORToronto	31	30	.133	.286	3.2%	25.8%	0.0%	.272	-1.0	2.6
2026BOS	BOSBoston	183	161	.068	.280	1.1%	14.8%	10.4%	.290	-4.0	17.8

PA: Plate appearances. Completed turns at the plate, including walks, hit-by-pitches and sacrifices.
AB: At bats. Plate appearances that count toward batting average; walks, hit-by-pitches, sacrifices and catcher's interference are left out.
ISO: Isolated Power. Extra bases per at-bat, separating extra-base power from batting average. Formula: (2B + 2 × 3B + 3 × HR) ÷ AB.
BABIP: Batting Average on Balls in Play. Hits on balls in play, excluding home runs. Contact quality, speed and defense all affect BABIP. Formula: (H − HR) ÷ (AB − SO − HR + SF).
HR%: Home-run rate. Formula: 100 × HR ÷ PA.
K%: Batting Strikeout Percentage. The percentage of plate appearances ending in a strikeout. Lower rates mean fewer strikeouts per opportunity. Formula: 100 × SO ÷ PA.
BB%: Batting Walk Percentage. The percentage of plate appearances ending in a walk, including intentional walks. Formula: 100 × BB ÷ PA.
wOBA: Weighted On-Base Average. Values each batting outcome by its contribution to scoring, using the matching season's run weights. Intentional walks are excluded. Formula: Weighted sum of unintentional BB, HBP, 1B, 2B, 3B and HR ÷ (AB + BB − IBB + SF + HBP).
wRAA: Weighted Runs Above Average. Batting runs above or below league average at the same number of plate appearances. Negative values are below average. This measure is not adjusted for ballpark. Formula: (wOBA − league wOBA) ÷ wOBA scale × PA.
wRC: Weighted Runs Created. Estimated batting runs created from wOBA and plate appearances, using the matching season's league scoring environment. This is not park-adjusted wRC+. Formula: [(wOBA − league wOBA) ÷ wOBA scale + league runs per PA] × PA.

Read advanced measures alongside playing time. N/A means the required inputs or season calculations are unavailable.

Advanced calculation notes by season

Pitching

3 seasons of pitching across 2 clubs. Season totals, oldest first. The team shown identifies the player's club when the totals were recorded.

Isiah Kiner-Falefa, season by season pitchingRegular season, oldest first
Season	Team	W-L%	ERA	G	IP	H	R	ER	BB	SO	WHIP
2023NYY	NYYYankees	N/A	2.25	4	4.0	4	1	1	0	1	1.00
2024TOR	TORToronto	N/A	4.50	2	2.0	1	1	1	2	0	1.50
2025TOR	TORToronto	N/A	0.00	1	0.2	0	0	0	0	0	0.00

W: Wins.
L: Losses.
W-L%: Win-loss percentage. Formula: W ÷ (W + L).
ERA: Earned run average, earned runs per nine innings. Formula: 27 × ER ÷ outs recorded.
G: Games pitched.
GS: Games started.
SV: Saves.
IP: Innings pitched. .1 and .2 mean one and two outs.
H: Hits allowed.
R: Runs allowed, earned and unearned.
ER: Earned runs allowed.
HR: Home runs allowed.
BB: Walks allowed, including intentional walks.
SO: Strikeouts.
WHIP: Walks plus hits per inning pitched. Formula: 3 × (BB + H) ÷ outs recorded.

Fielding

9 seasons of fielding across 5 clubs. Club-specific splits are shown in lighter type. Games at different positions can overlap.

Isiah Kiner-Falefa, fielding by seasonRegular season, oldest first
Season	Team	Pos	G	GS	INN	TC	PO	A	E	DP	FLD%	RF/9	RF/G	SB	CS	CS%	Pick	PB	WP
2018TEX	TEXTexas	C	35	35	305.1	243	227	15	1	2	.996	7.13	6.91	17	8	32.0%	1	4	20
2018TEX	TEXTexas	2B	20	19	170.1	95	40	53	2	15	.979	4.91	4.65	N/A	N/A	N/A	N/A	N/A	N/A
2018TEX	TEXTexas	3B	46	38	347.0	126	23	98	5	8	.960	3.14	2.63	N/A	N/A	N/A	N/A	N/A	N/A
2018TEX	TEXTexas	SS	2	2	17.0	13	6	6	1	3	.923	6.35	6.00	N/A	N/A	N/A	N/A	N/A	N/A
2018TEX	TEXTexas	DH	1	0	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
2019TEX	TEXTexas	C	38	31	280.2	255	243	11	1	0	.996	8.14	6.68	12	5	29.4%	0	4	24
2019TEX	TEXTexas	3B	25	23	211.2	73	18	53	2	5	.973	3.02	2.84	N/A	N/A	N/A	N/A	N/A	N/A
2019TEX	TEXTexas	DH	1	1	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
2020TEX	TEXTexas	3B	46	42	366.1	116	32	79	5	4	.957	2.73	2.41	N/A	N/A	N/A	N/A	N/A	N/A
2020TEX	TEXTexas	SS	15	15	121.0	43	12	31	0	6	1.000	3.20	2.87	N/A	N/A	N/A	N/A	N/A	N/A
2021TEX	TEXTexas	SS	156	155	1360.0	669	214	436	19	98	.972	4.30	4.17	N/A	N/A	N/A	N/A	N/A	N/A
2021TEX	TEXTexas	DH	1	1	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
2022NYY	NYYYankees	3B	6	4	42.0	11	2	8	1	0	.909	2.14	1.67	N/A	N/A	N/A	N/A	N/A	N/A
2022NYY	NYYYankees	SS	138	131	1185.0	495	149	331	15	51	.970	3.65	3.48	N/A	N/A	N/A	N/A	N/A	N/A
2023NYY	NYYYankees	P	4	0	4.0	0	0	0	0	0	N/A	0.00	0.00	N/A	N/A	N/A	N/A	N/A	N/A
2023NYY	NYYYankees	2B	1	0	1.0	1	1	0	0	0	1.000	9.00	1.00	N/A	N/A	N/A	N/A	N/A	N/A
2023NYY	NYYYankees	3B	31	26	240.1	81	19	59	3	7	.963	2.92	2.52	N/A	N/A	N/A	N/A	N/A	N/A
2023NYY	NYYYankees	SS	1	1	8.0	6	2	4	0	1	1.000	6.75	6.00	N/A	N/A	N/A	N/A	N/A	N/A
2023NYY	NYYYankees	LF	37	28	248.0	65	61	2	2	0	.969	2.29	1.70	N/A	N/A	N/A	N/A	N/A	N/A
2023NYY	NYYYankees	CF	41	29	278.1	85	83	1	1	0	.988	2.72	2.05	N/A	N/A	N/A	N/A	N/A	N/A
2023NYY	NYYYankees	RF	7	4	40.0	10	10	0	0	0	1.000	2.25	1.43	N/A	N/A	N/A	N/A	N/A	N/A
2024All	All teams	P	2	0	2.0	1	1	0	0	0	1.000	4.50	0.50	N/A	N/A	N/A	N/A	N/A	N/A
2024All	All teams	2B	56	42	376.0	194	69	123	2	28	.990	4.60	3.43	N/A	N/A	N/A	N/A	N/A	N/A
2024All	All teams	3B	48	43	354.0	108	29	77	2	9	.981	2.69	2.21	N/A	N/A	N/A	N/A	N/A	N/A
2024All	All teams	SS	43	37	330.0	142	49	92	1	23	.993	3.85	3.28	N/A	N/A	N/A	N/A	N/A	N/A
2024All	All teams	CF	1	0	1.0	0	0	0	0	0	N/A	0.00	0.00	N/A	N/A	N/A	N/A	N/A	N/A
2024TOR	TORToronto	2B	40	27	246.2	134	49	84	1	20	.993	4.85	3.33	N/A	N/A	N/A	N/A	N/A	N/A
2024TOR	TORToronto	3B	39	36	290.0	92	26	65	1	9	.989	2.82	2.33	N/A	N/A	N/A	N/A	N/A	N/A
2024TOR	TORToronto	SS	15	11	105.0	51	18	32	1	9	.980	4.29	3.33	N/A	N/A	N/A	N/A	N/A	N/A
2024TOR	TORToronto	P	2	0	2.0	1	1	0	0	0	1.000	4.50	0.50	N/A	N/A	N/A	N/A	N/A	N/A
2024TOR	TORToronto	CF	1	0	1.0	0	0	0	0	0	N/A	0.00	0.00	N/A	N/A	N/A	N/A	N/A	N/A
2024PIT	PITPittsburgh	SS	28	26	225.0	91	31	60	0	14	1.000	3.64	3.25	N/A	N/A	N/A	N/A	N/A	N/A
2024PIT	PITPittsburgh	2B	16	15	129.1	60	20	39	1	8	.983	4.11	3.69	N/A	N/A	N/A	N/A	N/A	N/A
2024PIT	PITPittsburgh	3B	9	7	64.0	16	3	12	1	0	.938	2.11	1.67	N/A	N/A	N/A	N/A	N/A	N/A
2025All	All teams	P	1	0	0.2	0	0	0	0	0	N/A	0.00	0.00	N/A	N/A	N/A	N/A	N/A	N/A
2025All	All teams	2B	13	1	26.1	11	3	8	0	1	1.000	3.76	0.85	N/A	N/A	N/A	N/A	N/A	N/A
2025All	All teams	3B	32	30	256.2	76	18	55	3	5	.961	2.56	2.28	N/A	N/A	N/A	N/A	N/A	N/A
2025All	All teams	SS	95	93	817.0	338	123	209	6	34	.982	3.66	3.49	N/A	N/A	N/A	N/A	N/A	N/A
2025PIT	PITPittsburgh	SS	94	93	815.0	335	122	207	6	33	.982	3.63	3.50	N/A	N/A	N/A	N/A	N/A	N/A
2025PIT	PITPittsburgh	3B	25	24	211.2	62	15	45	2	4	.968	2.55	2.40	N/A	N/A	N/A	N/A	N/A	N/A
2025TOR	TORToronto	2B	13	1	26.1	11	3	8	0	1	1.000	3.76	0.85	N/A	N/A	N/A	N/A	N/A	N/A
2025TOR	TORToronto	3B	7	6	45.0	14	3	10	1	1	.929	2.60	1.86	N/A	N/A	N/A	N/A	N/A	N/A
2025TOR	TORToronto	P	1	0	0.2	0	0	0	0	0	N/A	0.00	0.00	N/A	N/A	N/A	N/A	N/A	N/A
2025TOR	TORToronto	SS	1	0	2.0	3	1	2	0	1	1.000	13.50	3.00	N/A	N/A	N/A	N/A	N/A	N/A
2026BOS	BOSBoston	1B	1	0	3.0	0	0	0	0	0	N/A	0.00	0.00	N/A	N/A	N/A	N/A	N/A	N/A
2026BOS	BOSBoston	2B	43	31	283.2	120	46	72	2	16	.983	3.74	2.74	N/A	N/A	N/A	N/A	N/A	N/A
2026BOS	BOSBoston	3B	8	5	46.0	19	4	15	0	1	1.000	3.72	2.38	N/A	N/A	N/A	N/A	N/A	N/A
2026BOS	BOSBoston	SS	19	12	109.0	39	12	27	0	5	1.000	3.22	2.05	N/A	N/A	N/A	N/A	N/A	N/A
2026BOS	BOSBoston	DH	1	0	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A

Pos: Position played. DH is designated hitter.
G: Games played at the position.
GS: Games started at the position.
INN: Innings in the field at the position. .1 and .2 mean one and two outs.
TC: Total chances. Formula: PO + A + E.
PO: Putouts.
A: Assists.
E: Errors.
DP: Double plays turned.
FLD%: Fielding percentage. Formula: (PO + A) ÷ TC.
RF/9: Range factor per nine innings. Formula: 27 × (PO + A) ÷ outs in the field.
RF/G: Range factor per game. Formula: (PO + A) ÷ G.
SB: Stolen bases allowed while catching.
CS: Runners caught stealing while catching.
CS%: Caught-stealing rate. Formula: 100 × CS ÷ (SB + CS).
Pick: Runners picked off by the catcher.
PB: Passed balls.
WP: Wild pitches while catching.

A designated hitter does not play in the field, so DH rows show N/A for fielding measures.

Batted-ball data

Recorded measurements and MLBDB estimates from the pitches seen and the balls put in play as a hitter. Each table's note says which.

MLBDB calculates these numbers from recorded game measurements. EV balls and LA balls show the sample sizes. EV+LA balls have both measurements and are used for barrel percentage. Seasons without these measurements show N/A.

Isiah Kiner-Falefa, hitting by season: contactRegular season, oldest first
Season	Team	BBE	EV+LA balls	MLBDB barrels	MLBDB Barrel%	EV balls	Avg EV balls	Avg EV	Max EV	Hard-hit%	LA balls	Avg LA balls	Avg LA	Sweet-spot%
2018TEX	TEXTexas	300	282	2	0.7%	282	279	85.0	107.9	25.2%	282	279	7.0	30.1%
2019TEX	TEXTexas	155	152	2	1.3%	152	151	87.3	104.9	34.2%	152	151	7.4	31.6%
2020TEX	TEXTexas	180	180	4	2.2%	180	179	87.2	106.2	31.1%	180	179	0.8	23.9%
2021TEX	TEXTexas	548	547	10	1.8%	547	546	85.5	107.9	28.9%	547	546	5.4	32.9%
2022NYY	NYYYankees	419	418	5	1.2%	418	411	86.2	109.8	30.1%	419	412	4.3	31.0%
2023NYY	NYYYankees	260	260	8	3.1%	260	256	88.8	109.6	39.2%	260	256	7.2	35.0%
2024All	All teams	392	390	9	2.3%	390	382	86.1	107.9	29.7%	390	382	9.1	33.3%
2024TOR	TORToronto	225	223	5	2.2%	223	217	85.1	107.9	26.9%	223	217	9.9	35.4%
2024PIT	PITPittsburgh	167	167	4	2.4%	167	165	87.5	105.9	33.5%	167	165	8.0	30.5%
2025All	All teams	360	360	5	1.4%	360	349	84.6	106.3	27.5%	360	349	4.0	30.6%
2025PIT	PITPittsburgh	338	338	5	1.5%	338	328	84.4	106.3	26.6%	338	328	3.9	31.4%
2025TOR	TORToronto	22	22	0	0.0%	22	21	87.8	103.9	40.9%	22	21	5.2	18.2%
2026BOS	BOSBoston	137	135	3	2.2%	135	130	82.5	109.0	25.9%	136	131	7.6	33.8%

BBE: Batted Balls. Completed turns to bat that ended with a batted ball, including home runs. Some balls have no speed or angle measurement.
EV+LA balls: Balls with Recorded Speed and Angle. Balls that have both a usable speed and angle measurement. These are the balls used to calculate barrel percentage.
MLBDB barrels: MLBDB Barrels. Balls hit very hard at an angle suited to deep hits. MLBDB checks the recorded speed and angle against its documented barrel zone. Balls missing either measurement are left out. Rounded measurements can affect close calls. This is MLBDB's calculated classification.
MLBDB Barrel%: MLBDB Barrel Percentage. The percentage of balls with both speed and angle recorded that MLBDB counts as barrels. Missing measurements are left out. Formula: 100 × barrels ÷ balls with recorded speed and angle.
EV balls: Balls with Recorded Speed. All batted balls with a usable speed measurement, including bunts. This is the sample used for hard-hit percentage.
Avg EV balls: Average Exit Velocity Sample. Balls with recorded speed, excluding labelled bunts. Used for average and maximum exit velocity.
Avg EV: Average Exit Velocity. Average ball speed just after contact, in miles per hour. Balls with no speed measurement are left out. Balls labelled as bunts are excluded. Unknown bunt labels are retained. Formula: Sum of recorded speeds excluding labelled bunts ÷ Avg EV balls.
Max EV: Maximum Exit Velocity. The fastest recorded batted ball, in miles per hour. Balls labelled as bunts are excluded. Unknown bunt labels are retained.
Hard-hit%: Hard-Hit Percentage. The percentage of speed-measured balls hit at least 95 miles per hour. Formula: 100 × hard-hit balls ÷ balls with recorded speed.
LA balls: Balls with Recorded Angle. All batted balls with a usable angle measurement, including bunts. This is the sample used for sweet-spot percentage.
Avg LA balls: Average Launch Angle Sample. Balls with recorded angle, excluding labelled bunts. Used for average launch angle.
Avg LA: Average Launch Angle. Average angle at which the ball leaves the bat, in degrees. A negative angle points toward the ground. Higher is not always better. Balls labelled as bunts are excluded. Unknown bunt labels are retained. Formula: Sum of recorded angles excluding labelled bunts ÷ Avg LA balls.
Sweet-spot%: Sweet-Spot Percentage. The percentage of angle-measured balls launched from 8 to 32 degrees. Formula: 100 × sweet-spot balls ÷ balls with recorded angle.

Direction is estimated from recorded hit locations and the hand used to bat on each play. Rates divide by Located balls and show N/A below 95% location coverage. Unmapped balls are left out. Higher is not always better.

Isiah Kiner-Falefa, hitting by season: hit directionRegular season, oldest first
Season	Team	Located balls	Location coverage	Pull%	Center%	Oppo%	Pull balls	Center balls	Oppo balls	Unmapped balls
2018TEX	TEXTexas	289	96.3%	31.5%	38.1%	30.4%	91	110	88	11
2019TEX	TEXTexas	155	100.0%	29.0%	32.9%	38.1%	45	51	59	0
2020TEX	TEXTexas	180	100.0%	32.2%	40.6%	27.2%	58	73	49	0
2021TEX	TEXTexas	547	99.8%	31.6%	38.8%	29.6%	173	212	162	1
2022NYY	NYYYankees	418	99.8%	31.6%	39.0%	29.4%	132	163	123	1
2023NYY	NYYYankees	260	100.0%	34.2%	38.8%	26.9%	89	101	70	0
2024All	All teams	392	100.0%	33.7%	39.8%	26.5%	132	156	104	0
2024TOR	TORToronto	225	100.0%	32.9%	38.7%	28.4%	74	87	64	0
2024PIT	PITPittsburgh	167	100.0%	34.7%	41.3%	24.0%	58	69	40	0
2025All	All teams	358	99.4%	34.9%	38.0%	27.1%	125	136	97	2
2025PIT	PITPittsburgh	336	99.4%	34.8%	38.1%	27.1%	117	128	91	2
2025TOR	TORToronto	22	100.0%	36.4%	36.4%	27.3%	8	8	6	0
2026BOS	BOSBoston	136	99.3%	38.2%	38.2%	23.5%	52	52	32	1

Located balls: Balls with Usable Hit Locations. Balls whose recorded location and batting hand support an estimate of pull, center or opposite-field direction.
Location coverage: Hit-Location Coverage. The share of all balls that can be mapped. A rounded 95% can be slightly below the cutoff; the cutoff uses the original counts. Formula: 100 × located balls ÷ all batted balls.
Pull%: Estimated Pull Percentage. The share of located balls hit toward the batter's pull side. Uses located balls only. N/A when fewer than 95% of all balls can be mapped. These are chart-based estimates. Formula: 100 × pulled balls ÷ located balls.
Center%: Estimated Center-Field Percentage. The share of located balls estimated toward center field. Uses located balls only. N/A when fewer than 95% of all balls can be mapped. These are chart-based estimates. Formula: 100 × center-field balls ÷ located balls.
Oppo%: Estimated Opposite-Field Percentage. The share of located balls hit toward the side opposite the batter's pull side. Uses located balls only. N/A when fewer than 95% of all balls can be mapped. These are chart-based estimates. Formula: 100 × opposite-field balls ÷ located balls.
Pull balls: Estimated Pulled Balls. Balls estimated toward the pull side: left field for right-handed hitters, or right field for left-handed hitters.
Center balls: Estimated Balls to Center. Balls estimated toward center field, regardless of batting hand.
Oppo balls: Estimated Opposite-Field Balls. Balls estimated toward the opposite side: right field for right-handed hitters, or left field for left-handed hitters.
Unmapped balls: Balls with Unusable Hit Locations. Balls with missing details, unusable coordinates or locations outside the field area used for these estimates. They are excluded from direction percentages.

Pitches counts every pitch actually thrown; automatic balls and strikes are left out. Swings include bunt attempts, and caught foul tips count as whiffs. Whiff% divides misses by swings; SwStr% divides misses by pitches. Zone rates need a recorded location for at least 95% of pitches. Missing results show N/A. For 2018 through 2024, inside or outside the zone is an MLBDB estimate from recorded pitch locations and batter zone heights; from 2025, MLB's recorded zone labels are used.

Isiah Kiner-Falefa, hitting by season: pitch disciplineRegular season, oldest first
Season	Team	Pitches	Swings	Whiff%	SwStr%	Contact%	Swing%	Chase%	Zone%	Z-Swing%	Z-Contact%	O-Contact%	First delivered strike%	Called%	CSW%	Zone coverage
2018TEX	TEXTexas	1499	616	14.8%	6.1%	85.2%	41.1%	24.6%	52.8%	55.8%	94.1%	62.6%	55.7%	22.9%	29.0%	99.9%
2019TEX	TEXTexas	848	365	18.9%	8.1%	81.1%	43.0%	28.8%	49.2%	57.8%	91.3%	61.3%	63.1%	21.3%	29.5%	100.0%
2020TEX	TEXTexas	799	379	15.8%	7.5%	84.2%	47.4%	27.3%	52.3%	65.8%	90.5%	67.3%	60.7%	20.3%	27.8%	100.0%
2021TEX	TEXTexas	2396	1115	14.5%	6.8%	85.5%	46.5%	30.7%	49.5%	62.7%	93.1%	70.2%	60.4%	20.1%	26.9%	100.0%
2022NYY	NYYYankees	1940	868	11.3%	5.1%	88.7%	44.7%	30.8%	51.2%	58.0%	93.9%	78.4%	62.3%	21.3%	26.4%	100.0%
2023NYY	NYYYankees	1454	653	19.6%	8.8%	80.4%	44.9%	26.5%	52.8%	61.3%	88.5%	59.3%	61.4%	20.1%	28.9%	100.0%
2024All	All teams	1710	788	14.8%	6.8%	85.2%	46.1%	30.1%	52.1%	60.9%	90.6%	73.1%	60.6%	21.8%	28.7%	99.5%
2024TOR	TORToronto	950	430	13.3%	6.0%	86.7%	45.3%	30.7%	51.5%	59.2%	91.3%	77.1%	60.3%	22.2%	28.2%	99.1%
2024PIT	PITPittsburgh	760	358	16.8%	7.9%	83.2%	47.1%	29.3%	52.9%	62.9%	89.7%	67.6%	61.1%	21.3%	29.2%	100.0%
2025All	All teams	1631	801	15.1%	7.4%	84.9%	49.1%	32.2%	53.7%	63.7%	91.9%	68.7%	65.4%	20.0%	27.4%	100.0%
2025PIT	PITPittsburgh	1528	742	14.8%	7.2%	85.2%	48.6%	31.9%	53.4%	63.1%	91.8%	70.0%	65.0%	20.2%	27.4%	100.0%
2025TOR	TORToronto	103	59	18.6%	10.7%	81.4%	57.3%	37.2%	58.3%	71.7%	93.0%	50.0%	71.0%	17.5%	28.2%	100.0%
2026BOS	BOSBoston	663	317	17.7%	8.4%	82.3%	47.8%	31.8%	46.5%	66.2%	91.2%	66.4%	65.8%	16.7%	25.2%	100.0%

Pitches: Delivered Pitches. Pitches actually thrown to the batter in these completed games. Automatic balls and strikes are excluded.
Swings: Swings. Attempts to hit a delivered pitch, including bunts.
Whiff%: Whiff Percentage. How often a swing is recorded as a miss, including caught foul tips. This divides whiffs by swings. Formula: 100 × swings and misses ÷ swings.
SwStr%: Swinging-Strike Percentage. How often a delivered pitch produces a whiff, including caught foul tips. This divides whiffs by pitches, not swings. Formula: 100 × swings and misses ÷ delivered pitches.
Contact%: Contact Percentage. How often a swing touches the ball, including ordinary fouls and bunt attempts. Caught foul tips are excluded. Formula: 100 × swings with contact ÷ swings.
Swing%: Swing Percentage. How often the batter swings at a delivered pitch. Formula: 100 × swings ÷ delivered pitches.
Chase%: Chase Percentage. How often the batter swings at a pitch outside the strike zone. Also called O-Swing%. Formula: 100 × swings outside the zone ÷ pitches outside the zone.
Zone%: Strike-Zone Percentage. The share of pitches with usable locations that are inside the strike zone. Formula: 100 × pitches inside the zone ÷ pitches with usable locations.
Z-Swing%: Swing Percentage Inside the Zone. How often the batter swings at a pitch inside the strike zone. Formula: 100 × swings inside the zone ÷ pitches inside the zone.
Z-Contact%: Contact Percentage Inside the Zone. How often a swing at a pitch inside the strike zone touches the ball. Formula: 100 × contact inside the zone ÷ swings inside the zone.
O-Contact%: Contact Percentage Outside the Zone. How often a swing at a pitch outside the strike zone touches the ball. Formula: 100 × contact outside the zone ÷ swings outside the zone.
First delivered strike%: First Delivered Pitch Strike Rate. The share of first delivered pitches that are strikes or put in play. Turns with no delivered pitch are excluded. Unfinished turns that had a pitch are included. Formula: 100 × first-pitch strikes ÷ first delivered pitches.
Called%: Called-Strike Percentage. How often a delivered pitch is called a strike without a swing. Formula: 100 × called strikes ÷ delivered pitches.
CSW%: Called Strikes and Whiffs. How often a delivered pitch is either a called strike or a swing and miss. Ordinary fouls are excluded; caught foul tips count as whiffs. Formula: 100 × called strikes plus misses ÷ delivered pitches.
Zone coverage: Pitch-Location Coverage. The share of delivered pitches with a usable location. Zone rates need at least 95% coverage, checked before rounding.

MLBDB estimates these from recorded ball speed and angle, for seasons from 2018. A season or period shows N/A if any batted ball it needs is missing a measurement or falls outside what the model covers. That is common over a full season, and in 2018 and 2019 no regular player has complete measurements. Differences use actual results from the same completed games. These describe recorded contact, not future performance.

Isiah Kiner-Falefa, hitting by season: expectedRegular season, oldest first
Season	Team	Model balls	Measured%	MLBDB xBA	AVG − MLBDB xBA	MLBDB xSLG	SLG − MLBDB xSLG	MLBDB xwOBA	wOBA − MLBDB xwOBA	Missing pairs
2018TEX	TEXTexas	282	94.0%	N/A	N/A	N/A	N/A	N/A	N/A	18
2019TEX	TEXTexas	152	98.1%	N/A	N/A	N/A	N/A	N/A	N/A	3
2020TEX	TEXTexas	180	100.0%	.259	0.021	.338	0.032	.292	0.015	0
2021TEX	TEXTexas	547	99.8%	N/A	N/A	N/A	N/A	N/A	N/A	1
2022NYY	NYYYankees	418	99.8%	N/A	N/A	N/A	N/A	N/A	N/A	1
2023NYY	NYYYankees	260	100.0%	.251	-0.009	.350	-0.010	.295	-0.009	0
2024All	All teams	390	99.5%	N/A	N/A	N/A	N/A	N/A	N/A	2
2024TOR	TORToronto	223	99.1%	N/A	N/A	N/A	N/A	N/A	N/A	2
2024PIT	PITPittsburgh	167	100.0%	.256	-0.016	.353	-0.031	.280	-0.023	0
2025All	All teams	360	100.0%	.244	0.018	.304	0.031	.261	0.017	0
2025PIT	PITPittsburgh	338	100.0%	.248	0.017	.307	0.025	.265	0.014	0
2025TOR	TORToronto	22	100.0%	.194	0.039	.261	0.105	.215	0.057	0
2026BOS	BOSBoston	135	98.5%	N/A	N/A	N/A	N/A	N/A	N/A	2

Model balls: Measured Balls Used in Estimates. Eligible batted balls with both speed and angle recorded. Defensive awards that do not count as at-bats are excluded.
Measured%: Expected-Stat Measurement Coverage. The share of eligible batted balls with both speed and angle recorded. Each expected statistic shows N/A if any contact value it needs is missing or outside model support.
MLBDB xBA: MLBDB Expected Batting Average. Estimated hits per at-bat from ball speed, angle and same-season running speed when available. Strikeouts remain at-bats. Each needed contact contribution must be available. Reviewed seasons are 2018 through 2026; the current season is provisional. Formula: Estimated hits in at-bats ÷ at-bats.
AVG − MLBDB xBA: Batting Average Minus Expected. Recorded batting average minus the estimate, using the same completed games. A positive number means the actual result was higher. This does not measure luck alone.
MLBDB xSLG: MLBDB Expected Slugging Percentage. Estimated bases from hits per at-bat. Singles count once, doubles twice, triples three times and home runs four times. Formula: Estimated total bases in at-bats ÷ at-bats.
SLG − MLBDB xSLG: Slugging Minus Expected. Recorded slugging minus the estimate, using the same completed games. A positive number means more bases were recorded than estimated.
MLBDB xwOBA: MLBDB Expected Weighted Batting Average. Combines reconstructed expected contact values with recorded walks and hit-by-pitches. Walks and hit batters use the same season's batting weights. Intentional walks are excluded. Every needed contact value must be available.
wOBA − MLBDB xwOBA: Weighted Average Minus Expected. Recorded weighted batting average minus the estimate, using the same completed games and batting weights.
Missing pairs: Balls with Incomplete Measurements. Eligible balls missing speed, angle or both. These inputs are not filled in. The affected expected statistic is N/A, and the real appearance remains counted.

Last 5 games

Isiah Kiner-Falefa, batting in the last 5 gamesNewest first
Date	Game	Result	AB	R	H	BB	SO
Sep 25	vs CHCvs Chicago Cubs	W 2-0	1	1	1	2	0
Sep 25	vs CHCvs Chicago Cubs	W 4-3	4	1	1	0	0
Sep 24	vs CLEvs Cleveland Guardians	L 0-1	3	0	0	0	2
Sep 23	vs CLEvs Cleveland Guardians	W 1-0	0	0	0	0	0
Sep 22	vs CLEvs Cleveland Guardians	L 2-3	3	0	0	1	2

Bio

Position: Second baseman (2B)
Bats / Throws: R / R
Height / Weight: 5' 10", 195 lb
Number: 2
Born: Mar 23, 1995, Honolulu, HI, United States
Age: 31
MLB debut: Apr 10, 2018
Draft: 2013 draft, round 4, pick 130, Texas Rangers
School: Mid-Pacific Institute

Trade & Transaction History

1 recorded move.

Aug 19, 2026

AssignedTrade

Boston Red Sox sent 2B Isiah Kiner-Falefa on a rehab assignment to Worcester Red Sox.

From Boston Red SoxTo Worcester Red Sox