most wins in one season since 1990 by a pitcher

Since 1990, Bob Welch has won the most games in a season, with 27 wins in 1990.

	NAME	W	SEASON	TM	L	W%	G	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Bob Welch B. Welch	27	1990	OAK	6	.818	35	35	2.95	127	2	2	0	238.0	214	78	90	26	77	5	0	4	979	2	4.80	2.91	1.65	0.98	13.0	7.9	1.22	.253	3.40	79	4.19	110	8.09	-11.1
2	Justin Verlander J. Verlander	24	2011	DET	5	.828	34	34	2.40	250	4	2	0	251.0	174	67	73	24	57	3	0	0	969	7	8.96	2.04	4.39	0.86	25.8	5.9	0.92	.236	2.62	58	2.99	74	6.24	29.4
3	Randy Johnson R. Johnson	24	2002	ARI	5	.828	35	35	2.32	334	8	4	0	260.0	197	67	78	26	71	13	0	1	1,035	3	11.56	2.46	4.70	0.90	32.3	6.9	1.03	.289	2.70	54	2.65	61	6.82	47
4	John Smoltz J. Smoltz	24	1996	ATL	8	.750	35	35	2.94	276	6	2	0	253.2	199	83	93	19	55	2	0	3	995	10	9.79	1.95	5.02	0.67	27.7	5.5	1.00	.280	3.30	69	2.63	60	7.06	48.4
5	Curt Schilling C. Schilling	23	2002	ARI	7	.767	36	35	3.23	316	5	1	0	259.1	218	93	95	29	33	3	0	1	1,017	6	10.97	1.15	9.58	1.01	31.1	3.2	0.97	.297	3.30	75	2.39	55	7.57	54.3
6	Barry Zito B. Zito	23	2002	OAK	5	.821	35	35	2.75	182	1	0	0	229.1	182	70	79	24	78	9	0	2	939	2	7.14	3.06	2.33	0.94	19.4	8.3	1.13	.245	3.10	63	3.86	89	7.14	12.6
7	Pedro Martinez P. Martinez	23	1999	BOS	4	.852	31	29	2.07	313	5	1	0	213.1	160	49	56	9	37	9	1	1	835	6	13.20	1.56	8.46	0.38	37.5	4.4	0.92	.323	2.36	42	1.38	30	6.75	79.4
8	Rick Porcello R. Porcello	22	2016	BOS	4	.846	33	33	3.15	189	3	0	0	223.0	193	78	85	23	32	13	0	0	890	3	7.63	1.29	5.91	0.93	21.2	3.6	1.01	.269	3.43	71	3.39	81	7.79	20.1
9	Jake Arrieta J. Arrieta	22	2015	CHC	6	.786	33	33	1.77	236	4	3	0	229.0	150	45	52	10	48	6	0	2	870	6	9.28	1.89	4.92	0.39	27.1	5.5	0.86	.246	2.04	45	2.34	60	5.90	39
10	Cliff Lee C. Lee	22	2008	CLE	3	.880	31	31	2.54	170	4	2	0	223.1	214	63	68	12	34	5	0	1	891	4	6.85	1.37	5.00	0.48	19.1	3.8	1.11	.301	2.74	59	2.82	67	8.62	35.4
11	Brandon Webb B. Webb	22	2008	ARI	7	.759	34	34	3.30	183	3	1	0	226.2	206	83	95	13	65	12	0	5	944	8	7.27	2.58	2.82	0.52	19.4	6.9	1.20	.288	3.77	73	3.27	74	8.18	28
12	Dontrelle Willis D. Willis	22	2005	FLA	10	.688	34	34	2.63	170	7	5	0	236.1	213	69	79	11	55	8	0	3	960	2	6.47	2.09	3.09	0.42	17.7	5.7	1.13	.282	3.01	64	2.98	71	8.11	31.6
13	Roy Halladay R. Halladay	22	2003	TOR	7	.759	36	36	3.25	204	9	2	0	266.0	253	96	111	26	32	9	0	1	1,071	6	6.90	1.08	6.38	0.88	19.0	3.0	1.07	.284	3.76	70	3.22	71	8.56	38.6
14	Matt Morris M. Morris	22	2001	STL	8	.733	34	34	3.16	185	2	1	0	216.1	218	76	86	13	54	13	0	3	909	5	7.70	2.25	3.43	0.54	20.4	5.9	1.26	.318	3.58	74	3.04	69	9.07	32.6
15	Curt Schilling C. Schilling	22	2001	ARI	6	.786	35	35	2.98	293	6	1	0	256.2	237	85	86	37	39	1	0	0	1,021	4	10.27	1.37	7.51	1.30	28.7	3.8	1.08	.307	3.02	66	3.10	70	8.31	38
16	Mike Hampton M. Hampton	22	1999	HOU	4	.846	34	34	2.90	177	3	2	0	239.0	206	77	86	12	101	5	0	2	979	9	6.67	3.80	1.75	0.45	18.1	10.3	1.28	.284	3.24	68	3.63	84	7.76	19.4
17	John Burkett J. Burkett	22	1993	SFG	7	.759	34	34	3.65	145	2	1	0	231.2	224	94	100	18	40	11	0	4	942	1	5.63	1.55	3.63	0.70	15.4	4.2	1.14	.283	3.88	95	3.40	85	8.70	15.8
18	Tom Glavine T. Glavine	22	1993	ATL	6	.786	36	36	3.20	120	4	2	0	239.1	236	85	91	16	90	2	0	7	1,014	4	4.51	3.38	1.33	0.60	11.8	8.9	1.36	.280	3.42	77	4.00	97	8.87	3.7
19	Jack McDowell J. McDowell	22	1993	CWS	10	.688	34	34	3.37	158	10	4	0	256.2	261	96	104	20	69	3	0	6	1,067	8	5.54	2.42	2.29	0.70	14.8	6.5	1.29	.295	3.65	80	3.60	84	9.15	19.1
20	Doug Drabek D. Drabek	22	1990	PIT	6	.786	33	33	2.76	131	9	3	0	231.1	190	71	78	15	56	3	0	2	918	6	5.10	2.18	2.34	0.58	14.3	6.1	1.06	.245	3.03	75	3.27	87	7.39	12.2
21	Dave Stewart D. Stewart	22	1990	OAK	11	.667	36	36	2.56	166	11	4	0	267.0	226	76	84	16	83	5	0	1	1,088	8	5.60	2.80	2.00	0.54	15.3	7.6	1.16	.257	2.83	69	3.32	88	7.62	13.9
22	Kyle Wright K. Wright	21	2022	ATL	5	.808	30	30	3.19	174	0	0	0	180.1	156	64	67	19	53	9	0	0	738	7	8.68	2.65	3.28	0.95	23.6	7.2	1.16	.284	3.34	78	3.58	91	7.79	7.4
23	Justin Verlander J. Verlander	21	2019	HOU	6	.778	34	34	2.58	300	2	1	0	223.0	137	64	66	36	42	6	0	0	847	4	12.11	1.70	7.14	1.45	35.4	5.0	0.80	.218	2.66	57	3.26	72	5.53	31.5
24	Blake Snell B. Snell	21	2018	TBR	5	.808	31	31	1.89	221	0	0	0	180.2	112	38	41	16	64	1	0	2	700	13	11.01	3.19	3.45	0.80	31.6	9.1	0.97	.241	2.04	46	2.94	72	5.58	23.1
25	Clayton Kershaw C. Kershaw	21	2014	LAD	3	.875	27	27	1.77	239	6	2	0	198.1	139	39	42	9	31	2	0	0	749	7	10.85	1.41	7.71	0.41	31.9	4.1	0.86	.278	1.91	51	1.81	50	6.31	40.5