Justin Verlander has the most career wins in the postseason, with 7 wins.

Interpreted as:

MLB game 1 most wins by a player

	NAME	W	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	H/9
1	Justin Verlander J. Verlander	7	4	.636	14	14	4.44	83	0	0	0	73.0	60	36	37	9	31	2	0	0	304	3	10.23	3.82	2.68	1.11	27.3	10.2	1.25	.285	4.56	7.40
2	Clayton Kershaw C. Kershaw	5	6	.455	12	12	6.28	80	0	0	0	61.2	60	43	44	13	24	0	0	1	266	4	11.68	3.50	3.33	1.90	30.1	9.0	1.36	.315	6.42	8.76
3	CC Sabathia	5	2	.714	9	9	4.53	48	0	0	0	51.2	47	26	28	7	23	3	0	2	222	2	8.36	4.01	2.09	1.22	21.6	10.4	1.35	.284	4.88	8.19
4	John Smoltz J. Smoltz	5	0	1.000	7	6	1.70	35	0	0	1	47.2	26	9	9	3	17	0	1	0	183	3	6.61	3.21	2.06	0.57	19.1	9.3	0.90	.180	1.70	4.91
5	Red Ruffing R. Ruffing	5	1	.833	6	6	2.39	37	5	0	0	52.2	43	14	20	1	20	0	0	2	214	0	6.32	3.42	1.85	0.17	17.3	9.3	1.20	.269	3.42	7.35
6	Blake Snell B. Snell	4	1	.800	5	5	2.05	34	0	0	0	30.2	18	7	7	4	7	0	0	0	113	1	9.98	2.05	4.86	1.17	30.1	6.2	0.82	.206	2.05	5.28
7	Madison Bumgarner M. Bumgarner	4	1	.800	5	5	1.73	30	2	2	0	36.1	23	7	7	3	6	2	0	1	140	0	7.43	1.49	5.00	0.74	21.4	4.3	0.80	.202	1.73	5.70
8	Jon Lester J. Lester	4	5	.444	12	12	2.64	74	0	0	0	81.2	64	24	25	8	19	3	0	0	326	2	8.16	2.09	3.89	0.88	22.7	5.8	1.02	.252	2.76	7.05
9	Cole Hamels C. Hamels	4	2	.667	7	6	3.89	35	0	0	0	39.1	32	17	18	4	14	0	0	0	163	1	8.01	3.20	2.50	0.92	21.5	8.6	1.17	.255	4.12	7.32
10	Chris Carpenter C. Carpenter	4	1	.800	5	5	2.59	20	0	0	0	31.1	27	9	9	3	12	1	0	0	128	0	5.74	3.45	1.67	0.86	15.6	9.4	1.24	.261	2.59	7.76
11	David Wells D. Wells	4	1	.800	7	5	3.07	27	0	0	0	41.0	33	14	14	5	10	2	1	1	164	0	5.93	2.20	2.70	1.10	16.5	6.1	1.05	.233	3.07	7.24
12	Jack Morris J. Morris	4	2	.667	6	6	3.32	31	2	0	0	43.1	36	16	16	4	17	0	0	0	176	2	6.44	3.53	1.82	0.83	17.6	9.7	1.22	.258	3.32	7.48
13	Whitey Ford W. Ford	4	3	.571	8	8	3.90	36	3	1	0	55.1	54	24	26	6	17	0	0	1	235	1	5.86	2.77	2.12	0.98	15.3	7.2	1.28	.273	4.23	8.78
14	Zack Wheeler Z. Wheeler	3	0	1.000	5	5	0.82	37	0	0	0	33.0	12	3	3	1	6	2	0	0	116	0	10.09	1.64	6.17	0.27	31.9	5.2	0.55	.157	0.82	3.27
15	Will Smith W. Smith	3	0	1.000	7	0	0.00	5	0	0	0	6.1	1	0	0	0	2	0	2	0	21	0	7.11	2.84	2.50	0.00	23.8	9.5	0.47	.071	0.00	1.42
16	Gerrit Cole G. Cole	3	3	.500	8	8	4.47	50	0	0	0	44.1	45	22	23	11	9	1	0	1	187	1	10.15	1.83	5.56	2.23	26.7	4.8	1.22	.293	4.67	9.14
17	Tim Lincecum T. Lincecum	3	0	1.000	5	3	2.42	31	1	1	0	26.0	16	7	7	2	7	0	0	0	99	0	10.73	2.42	4.43	0.69	31.3	7.1	0.88	.237	2.42	5.54
18	Cliff Lee C. Lee	3	1	.750	4	4	2.43	32	2	0	0	29.2	25	8	10	1	1	1	0	0	115	1	9.71	0.30	32.00	0.30	27.8	0.9	0.88	.300	3.03	7.58
19	Josh Beckett J. Beckett	3	1	.750	5	5	2.55	38	1	1	0	35.1	24	10	10	3	7	1	0	1	136	3	9.68	1.78	5.43	0.76	27.9	5.1	0.88	.241	2.55	6.11
20	Mike Mussina M. Mussina	3	4	.429	7	7	3.86	42	0	0	0	42.0	42	18	20	8	7	1	0	2	174	0	9.00	1.50	6.00	1.71	24.1	4.0	1.17	.293	4.29	9.00
21	Curt Schilling C. Schilling	3	2	.600	6	6	3.83	35	1	1	0	40.0	36	17	19	4	10	1	0	0	168	1	7.88	2.25	3.50	0.90	20.8	6.0	1.15	.271	4.27	8.10
22	Greg Maddux G. Maddux	3	6	.333	13	11	3.12	44	2	0	0	75.0	72	26	38	6	23	2	1	8	312	0	5.28	2.76	1.91	0.72	14.1	7.4	1.27	.278	4.56	8.64
23	Dave Stewart D. Stewart	3	2	.600	9	7	2.73	32	1	1	0	52.2	37	16	17	7	18	2	2	0	208	1	5.47	3.08	1.78	1.20	15.4	8.7	1.04	.201	2.91	6.32
24	Tommy John T. John	3	0	1.000	4	4	2.30	15	1	0	0	27.1	25	7	13	3	7	2	0	0	116	0	4.94	2.30	2.14	0.99	12.9	6.0	1.17	.247	4.28	8.23
25	Don Gullett D. Gullett	3	3	.500	7	7	4.05	25	1	0	0	46.2	40	21	21	2	20	3	0	1	194	1	4.82	3.86	1.25	0.39	12.9	10.3	1.29	.264	4.05	7.71