Andy Pettitte has the most career starts in the postseason, with 44 starts.

Interpreted as:

most games playoffs started by a player

	NAME	GS	G	W	L	W%	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	Andy Pettitte A. Pettitte	44	44	19	11	.633	3.81	183	0	0	0	276.2	285	117	121	31	76	3	0	4	1,157	4	5.95	2.47	2.41	1.01	15.8	6.6	1.30	.294	3.94	9.27
2	Justin Verlander J. Verlander	37	38	17	12	.586	3.58	244	2	1	0	226.0	179	90	93	32	74	5	0	0	920	8	9.72	2.95	3.30	1.27	26.5	8.0	1.12	.260	3.70	7.13
3	Tom Glavine T. Glavine	35	35	14	16	.467	3.30	143	3	0	0	218.1	191	80	91	21	87	7	0	11	912	3	5.89	3.59	1.64	0.87	15.7	9.5	1.27	.260	3.75	7.87
4	Roger Clemens R. Clemens	34	35	12	8	.600	3.75	173	1	1	0	199.0	173	83	87	17	70	6	1	1	837	10	7.82	3.17	2.47	0.77	20.7	8.4	1.22	.273	3.93	7.82
5	Clayton Kershaw C. Kershaw	32	39	13	13	.500	4.49	213	0	0	1	194.1	165	97	102	30	51	4	2	5	788	11	9.86	2.36	4.18	1.39	27.0	6.5	1.11	.276	4.72	7.64
6	Greg Maddux G. Maddux	30	35	11	14	.440	3.27	125	2	0	1	198.0	195	72	97	14	51	9	2	16	836	4	5.68	2.32	2.45	0.64	15.0	6.1	1.24	.284	4.41	8.86
7	John Smoltz J. Smoltz	27	41	15	4	.789	2.67	199	2	1	4	209.0	172	62	67	17	67	3	11	6	856	6	8.57	2.89	2.97	0.73	23.2	7.8	1.14	.272	2.89	7.41
8	Max Scherzer M. Scherzer	25	30	7	8	.467	3.78	171	0	0	1	143.0	109	60	63	20	56	9	1	4	594	8	10.76	3.52	3.05	1.26	28.8	9.4	1.15	.263	3.97	6.86
9	John Lackey J. Lackey	23	29	8	6	.571	3.44	114	0	0	0	144.0	135	55	58	7	47	4	2	6	601	10	7.13	2.94	2.43	0.44	19.0	7.8	1.26	.298	3.63	8.44
10	CC Sabathia	23	26	10	7	.588	4.28	121	1	0	0	130.1	137	62	67	15	63	8	0	9	586	5	8.36	4.35	1.92	1.04	20.6	10.8	1.53	.322	4.63	9.46
11	Gerrit Cole G. Cole	22	22	11	6	.647	2.77	156	0	0	0	133.1	100	41	50	19	36	3	0	1	537	1	10.53	2.43	4.33	1.28	29.1	6.7	1.02	.251	3.38	6.75
12	Jon Lester J. Lester	22	26	9	7	.563	2.51	133	0	0	0	154.0	117	43	46	15	40	3	2	0	610	4	7.77	2.34	3.33	0.88	21.8	6.6	1.02	.243	2.69	6.84
13	Whitey Ford W. Ford	22	22	10	8	.556	2.71	94	7	3	0	146.0	132	44	51	8	34	3	0	2	594	4	5.79	2.10	2.76	0.49	15.8	5.7	1.14	.273	3.14	8.14
14	Zack Greinke Z. Greinke	21	22	4	6	.400	4.14	100	0	0	0	113.0	103	52	55	19	33	3	0	0	469	2	7.96	2.63	3.03	1.51	21.3	7.0	1.20	.268	4.38	8.20
15	Mike Mussina M. Mussina	21	23	7	8	.467	3.42	145	0	0	0	139.2	121	53	56	19	33	3	0	7	571	2	9.34	2.13	4.39	1.22	25.4	5.8	1.10	.275	3.61	7.80
16	Curt Schilling C. Schilling	19	19	11	2	.846	2.23	120	4	2	0	133.1	104	33	37	12	25	3	0	0	525	1	8.10	1.69	4.80	0.81	22.9	4.8	0.97	.252	2.50	7.02
17	Catfish Hunter C. Hunter	19	22	9	6	.600	3.26	70	4	1	1	132.1	114	48	49	21	35	1	2	6	536	2	4.76	2.38	2.00	1.43	13.1	6.5	1.13	.227	3.33	7.75
18	Walker Buehler W. Buehler	18	19	4	4	.500	3.04	114	0	0	1	94.2	73	32	34	9	36	2	1	2	388	3	10.84	3.42	3.17	0.86	29.4	9.3	1.15	.282	3.23	6.94
19	Chris Carpenter C. Carpenter	18	18	10	4	.714	3.00	68	1	1	0	108.0	104	36	43	11	36	6	0	2	461	1	5.67	3.00	1.89	0.92	14.8	7.8	1.30	.274	3.58	8.67
20	David Cone D. Cone	18	21	8	3	.727	3.80	94	1	0	0	111.1	93	47	52	12	58	2	2	1	480	6	7.60	4.69	1.62	0.97	19.6	12.1	1.36	.258	4.20	7.52
21	Orel Hershiser O. Hershiser	18	22	8	3	.727	2.59	97	4	2	1	132.0	103	38	43	8	43	6	2	5	533	6	6.61	2.93	2.26	0.55	18.2	8.1	1.11	.251	2.93	7.02
22	Dave Stewart D. Stewart	18	22	10	6	.625	2.84	73	3	1	0	133.0	99	42	45	13	48	4	3	1	539	4	4.94	3.25	1.52	0.88	13.5	8.9	1.11	.214	3.05	6.70
23	Charlie Morton C. Morton	17	18	7	5	.583	3.60	92	0	0	0	80.0	67	32	34	8	33	7	1	0	343	5	10.35	3.71	2.79	0.90	26.8	9.6	1.25	.291	3.83	7.54
24	David Wells D. Wells	17	27	10	5	.667	3.17	83	1	0	0	125.0	116	44	49	12	25	7	2	2	508	1	5.98	1.80	3.32	0.86	16.3	4.9	1.13	.273	3.53	8.35
25	Framber Valdez F. Valdez	16	17	7	6	.538	4.34	95	0	0	0	85.0	82	41	45	14	34	4	1	0	360	0	10.06	3.60	2.79	1.48	26.4	9.4	1.36	.319	4.76	8.68