highest career era in the postseason (minumum 20 games started)

Clayton Kershaw has the highest career ERA in the postseason when starting 20+ games, with an ERA of 4.63.

Interpreted as:

highest career era by a player in the postseason (minumum 20 or more games started)

	NAME	ERA	GS	G	W	L	W%	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	Clayton Kershaw C. Kershaw	4.63	32	40	13	13	.500	213	0	0	1	196.1	171	101	107	32	54	4	2	6	802	11	9.76	2.48	3.94	1.47	26.6	6.7	1.15	.279	4.90	7.84
2	CC Sabathia	4.28	23	26	10	7	.588	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
3	Zack Greinke Z. Greinke	4.14	21	22	4	6	.400	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
4	Andy Pettitte A. Pettitte	3.81	44	44	19	11	.633	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
5	Max Scherzer M. Scherzer	3.78	25	30	7	8	.467	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
6	Roger Clemens R. Clemens	3.75	34	35	12	8	.600	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
7	Justin Verlander J. Verlander	3.58	37	38	17	12	.586	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
8	John Lackey J. Lackey	3.44	23	29	8	6	.571	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
9	Mike Mussina M. Mussina	3.42	21	23	7	8	.467	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
10	Tom Glavine T. Glavine	3.30	35	35	14	16	.467	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
11	Greg Maddux G. Maddux	3.27	30	35	11	14	.440	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
12	Gerrit Cole G. Cole	2.77	22	22	11	6	.647	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
13	Whitey Ford W. Ford	2.71	22	22	10	8	.556	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	John Smoltz J. Smoltz	2.67	27	41	15	4	.789	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
15	Jon Lester J. Lester	2.51	22	26	9	7	.563	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