Player stats

Strikeouts per 9 Innings 2025

Strikeouts per nine innings pitched. Unlike K%, the denominator is innings rather than batters faced.

Season

Minimum workload: one inning pitched per game. Completed seasons use the league's scheduled regular-season game count; seasons in progress use team games played. This is a general pitching minimum, not a relief-pitcher qualification rule. Data through December 31, 2025. Data refreshed Sep 12, 2026, 7:39 AM UTC.

No. 1 / Strikeouts per 9 Innings / 2025

Dylan Cease

11.52

Season leader

Strikeouts per 9 Innings2025 season
#	Player	Team	IP	BF	K/9
1	D. CeaseDylan Cease	SD	168.0	722	11.52
2	G. CrochetGarrett Crochet	BOS	205.1	814	11.18
3	T. SkubalTarik Skubal	DET	195.1	748	11.10
4	J. LuzardoJesús Luzardo	PHI	183.2	758	10.58
5	Y. YamamotoYoshinobu Yamamoto	LAD	173.2	684	10.42
6	F. PeraltaFreddy Peralta	MIL	176.2	723	10.39
7	P. SkenesPaul Skenes	PIT	187.2	733	10.36
8	J. RyanJoe Ryan	MIN	171.0	689	10.21
9	S. GraySonny Gray	STL	180.2	753	10.01
10	H. BrownHunter Brown	HOU	185.1	729	10.00
11	L. WebbLogan Webb	SF	207.0	856	9.74
12	J. deGromJacob deGrom	TEX	172.2	669	9.64
13	B. WooBryan Woo	SEA	186.2	731	9.55
14	S. BazShane Baz	TB	166.1	711	9.52
15	W. WarrenWill Warren	NYY	162.1	711	9.48
16	C. SánchezCristopher Sánchez	PHI	202.0	807	9.45
17	N. PivettaNick Pivetta	SD	181.2	721	9.41
18	C. RodónCarlos Rodón	NYY	195.1	789	9.35
19	G. WilliamsGavin Williams	CLE	167.2	704	9.29
20	R. RayRobbie Ray	SF	182.1	755	9.18
21	R. PepiotRyan Pepiot	TB	167.2	679	8.96
22	K. GausmanKevin Gausman	TOR	193.0	775	8.81
23	Y. KikuchiYusei Kikuchi	LAA	178.1	772	8.78
24	C. BassittChris Bassitt	TOR	170.1	736	8.77
25	F. ValdezFramber Valdez	HOU	192.0	802	8.77
26	M. FriedMax Fried	NYY	195.1	801	8.71
27	B. SingerBrady Singer	CIN	169.2	716	8.65
28	Z. GallenZac Gallen	AZ	192.0	813	8.20
29	M. KellyMerrill Kelly	TEX	184.0	748	8.17
30	J. SorianoJosé Soriano	LAA	169.0	724	8.09
31	L. CastilloLuis Castillo	SEA	180.2	745	8.07
32	A. AbbottAndrew Abbott	CIN	166.1	684	8.06
33	D. PetersonDavid Peterson	NYM	168.2	723	8.00
34	T. BibeeTanner Bibee	CLE	182.1	762	8.00
35	M. BoydMatthew Boyd	CHC	179.2	718	7.71
36	M. KellerMitch Keller	PIT	176.1	749	7.66
37	B. PfaadtBrandon Pfaadt	AZ	176.2	767	7.49
38	J. BerríosJosé Berríos	TOR	166.0	698	7.48
39	D. KremerDean Kremer	BAL	171.2	708	7.44
40	S. AlcantaraSandy Alcantara	MIA	174.2	745	7.32
41	J. SpringsJeffrey Springs	ATH	171.0	713	7.26
42	C. HolmesClay Holmes	NYM	165.2	708	7.01
43	L. SeverinoLuis Severino	ATH	162.2	705	6.86
44	K. FreelandKyle Freeland	COL	162.2	709	6.86
45	B. BelloBrayan Bello	BOS	166.2	700	6.70
46	M. WachaMichael Wacha	KC	172.2	716	6.57
47	N. MartinezNick Martinez	CIN	165.2	683	6.30
48	Z. LittellZack Littell	CIN	186.2	759	6.27
49	K. HendricksKyle Hendricks	LAA	164.2	695	6.23
50	J. IrvinJake Irvin	WSH	180.0	787	6.20

K/9: Strikeouts per nine innings pitched. Unlike K%, the denominator is innings rather than batters faced.

Understanding Strikeouts per 9 Innings

Strikeouts per nine innings pitched. Unlike K%, the denominator is innings rather than batters faced.

Formula: 27 × SO ÷ outs recorded

Read rates alongside playing time. A small sample can produce an extreme result, and a missing value is different from zero.

Season rankings use regular-season records. A player has one combined row across teams; the team label identifies the associated team, not a separate team stint.

Source: MLB statistics and MLBDB derived measures. Formulas describe the measure above. Data refreshed Sep 12, 2026, 7:39 AM UTC.