Player stats

Quality Start Percentage 2018

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, 2018. Data refreshed Sep 12, 2026, 7:39 AM UTC.

No. 1 / Quality Start Percentage / 2018

Jacob deGrom

NYM

87.5%

Season leader

Quality Start Percentage2018 season
#	Player	Team	IP	BF	GS	QS%
1	J. deGromJacob deGrom	NYM	217.0	835	32	87.5%
2	M. ScherzerMax Scherzer	WSH	220.2	866	33	84.8%
3	J. VerlanderJustin Verlander	HOU	214.0	833	34	76.5%
4	A. NolaAaron Nola	PHI	212.1	831	33	75.8%
5	C. KluberCorey Kluber	CLE	215.0	842	33	75.8%
6	T. BauerTrevor Bauer	CLE	175.1	717	27	74.1%
7	K. FreelandKyle Freeland	COL	202.1	844	33	72.7%
8	M. ClevingerMike Clevinger	CLE	200.0	810	32	65.6%
9	Z. GreinkeZack Greinke	AZ	207.2	839	33	63.6%
10	C. CarrascoCarlos Carrasco	CLE	192.0	784	30	63.3%
11	M. MikolasMiles Mikolas	STL	200.2	808	32	62.5%
12	G. ColeGerrit Cole	HOU	200.1	799	32	62.5%
13	J. TaillonJameson Taillon	PIT	191.0	785	32	62.5%
14	Z. WheelerZack Wheeler	NYM	182.1	744	29	62.1%
15	B. SnellBlake Snell	TB	180.2	700	31	61.3%
16	G. MárquezGermán Márquez	COL	196.0	817	33	60.6%
17	C. MortonCharlie Morton	HOU	167.0	695	30	60.0%
18	D. PriceDavid Price	BOS	176.0	722	30	60.0%
19	R. LópezReynaldo López	CWS	188.2	799	32	59.4%
20	D. KeuchelDallas Keuchel	HOU	204.2	874	34	58.8%
21	M. LeakeMike Leake	SEA	185.2	784	31	58.1%
22	P. CorbinPatrick Corbin	AZ	200.0	800	33	57.6%
23	J. ShieldsJames Shields	CWS	204.2	871	33	57.6%
24	A. HeaneyAndrew Heaney	LAA	180.0	749	30	56.7%
25	T. RoarkTanner Roark	WSH	180.1	760	30	56.7%
26	K. GibsonKyle Gibson	MIN	196.2	826	32	56.3%
27	T. WilliamsTrevor Williams	PIT	170.2	701	31	54.8%
28	J. TeheranJulio Teheran	ATL	175.2	724	31	54.8%
29	S. NewcombSean Newcomb	ATL	164.0	696	30	53.3%
30	L. SeverinoLuis Severino	NYY	191.1	780	32	53.1%
31	J. BerríosJosé Berríos	MIN	192.1	797	32	53.1%
32	K. GausmanKevin Gausman	ATL	183.2	776	31	51.6%
33	K. HendricksKyle Hendricks	CHC	199.0	812	33	51.5%
34	M. FiersMike Fiers	OAK	172.0	714	30	50.0%
35	C. HamelsCole Hamels	CHC	190.2	806	32	50.0%
36	T. AndersonTyler Anderson	COL	176.0	737	32	50.0%
37	R. PorcelloRick Porcello	BOS	191.1	808	33	48.5%
38	J. HappJ.A. Happ	NYY	177.2	733	31	48.4%
39	J. ArrietaJake Arrieta	PHI	172.2	724	31	48.4%
40	D. BundyDylan Bundy	BAL	171.2	750	31	48.4%
41	J. LesterJon Lester	CHC	181.2	761	32	46.9%
42	L. GiolitoLucas Giolito	CWS	173.1	775	32	46.9%
43	J. JunisJakob Junis	KC	177.0	758	30	46.7%
44	M. BoydMatthew Boyd	DET	170.1	709	31	45.2%
45	M. GonzalesMarco Gonzales	SEA	166.2	686	29	44.8%
46	Z. GodleyZack Godley	AZ	178.1	791	32	43.8%
47	J. GrayJon Gray	COL	172.1	743	31	41.9%
48	J. QuintanaJose Quintana	CHC	174.1	739	32	40.6%
49	M. FoltynewiczMike Foltynewicz	ATL	183.0	744	31	38.7%
50	J. UreñaJosé Ureña	MIA	174.0	712	31	38.7%

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.