Player stats

Quality Start Percentage 2019

The percentage of a pitcher's starts that qualify as quality starts. Read this alongside the number of starts.

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, 2019. Data refreshed Sep 12, 2026, 7:39 AM UTC.

No. 1 / Quality Start Percentage / 2019

Gerrit Cole

HOU

78.8%

Season leader

Quality Start Percentage2019 season
#	Player	Team	IP	BF	GS	QS%
1	G. ColeGerrit Cole	HOU	212.1	817	33	78.8%
2	C. KershawClayton Kershaw	LAD	178.1	706	28	78.6%
3	J. VerlanderJustin Verlander	HOU	223.0	847	34	76.5%
4	H. Jin RyuHyun Jin Ryu	LAD	182.2	723	29	75.9%
5	Z. GreinkeZack Greinke	HOU	208.2	810	33	72.7%
6	P. CorbinPatrick Corbin	WSH	202.0	835	33	72.7%
7	S. BieberShane Bieber	CLE	214.1	859	33	72.7%
8	J. deGromJacob deGrom	NYM	204.0	804	32	71.9%
9	S. StrasburgStephen Strasburg	WSH	209.0	841	33	66.7%
10	J. BerríosJosé Berríos	MIN	200.1	842	32	65.6%
11	M. ScherzerMax Scherzer	WSH	172.1	693	27	63.0%
12	L. CastilloLuis Castillo	CIN	190.2	781	32	62.5%
13	M. SorokaMichael Soroka	ATL	174.2	701	29	62.1%
14	J. FlahertyJack Flaherty	STL	196.1	772	33	60.6%
15	L. LynnLance Lynn	TEX	208.1	875	33	60.6%
16	M. LeakeMike Leake	AZ	197.0	835	32	59.4%
17	M. BumgarnerMadison Bumgarner	SF	207.2	844	34	58.8%
18	L. GiolitoLucas Giolito	CWS	176.2	705	29	58.6%
19	Z. WheelerZack Wheeler	NYM	195.1	828	31	58.1%
20	C. MortonCharlie Morton	TB	194.2	790	33	57.6%
21	M. FiersMike Fiers	OAK	184.2	754	33	57.6%
22	W. BuehlerWalker Buehler	LAD	182.1	737	30	56.7%
23	M. StromanMarcus Stroman	NYM	184.1	774	32	56.3%
24	M. GonzalesMarco Gonzales	SEA	203.0	866	34	55.9%
25	T. BauerTrevor Bauer	CIN	213.0	911	34	55.9%
26	S. GraySonny Gray	CIN	175.1	708	31	54.8%
27	B. AndersonBrett Anderson	OAK	176.0	743	31	54.8%
28	J. MusgroveJoe Musgrove	PIT	170.1	718	31	54.8%
29	K. HendricksKyle Hendricks	CHC	177.0	730	30	53.3%
30	D. HudsonDakota Hudson	STL	174.2	757	32	53.1%
31	M. MikolasMiles Mikolas	STL	184.0	764	32	53.1%
32	N. SyndergaardNoah Syndergaard	NYM	197.2	825	32	53.1%
33	A. NolaAaron Nola	PHI	202.1	852	34	52.9%
34	M. MinorMike Minor	TEX	208.1	863	32	50.0%
35	Z. EflinZach Eflin	PHI	163.1	705	28	50.0%
36	B. KellerBrad Keller	KC	165.1	709	28	50.0%
37	M. TanakaMasahiro Tanaka	NYY	182.0	759	31	48.4%
38	E. RodriguezEduardo Rodriguez	BOS	203.1	859	34	47.1%
39	M. KellyMerrill Kelly	AZ	183.1	777	32	46.9%
40	M. FriedMax Fried	ATL	165.2	702	30	46.7%
41	J. TeheranJulio Teheran	ATL	174.2	754	33	45.5%
42	R. LópezReynaldo López	CWS	184.0	809	33	45.5%
43	A. WainwrightAdam Wainwright	STL	171.2	745	31	45.2%
44	J. LesterJon Lester	CHC	171.2	764	31	45.2%
45	J. QuintanaJose Quintana	CHC	171.0	745	31	45.2%
46	S. AlcantaraSandy Alcantara	MIA	197.1	838	32	43.8%
47	M. BoydMatthew Boyd	DET	185.1	788	32	43.8%
48	A. SánchezAníbal Sánchez	WSH	166.0	712	30	43.3%
49	W. MileyWade Miley	HOU	167.1	720	33	42.4%
50	H. BaileyHomer Bailey	OAK	163.1	696	31	41.9%

QS%: The percentage of a pitcher's starts that qualify as quality starts. Read this alongside the number of starts.

Understanding Quality Start Percentage

The percentage of a pitcher's starts that qualify as quality starts. Read this alongside the number of starts.

Formula: 100 × QS ÷ GS

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.