what was the lowest era during a postseason year by a pitcher who started at least 4 games

Sandy Koufax had the lowest ERA in the postseason when starting 4+ games, with an ERA of 0.95.

	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	Sandy Koufax S. Koufax	0.95	7	8	4	3	.571	61	4	2	0	57.0	36	6	10	2	11	0	0	1	213	0	9.63	1.74	5.55	0.32	28.6	5.2	0.82	.245	1.58	5.68
2	Monte Pearson M. Pearson	1.01	4	4	4	0	1.000	28	3	1	0	35.2	19	4	5	1	7	0	0	0	133	0	7.07	1.77	4.00	0.25	21.1	5.3	0.73	.186	1.26	4.79
3	Christy Mathewson C. Mathewson	1.06	11	11	5	5	.500	48	10	4	0	101.2	76	12	22	1	10	1	0	3	391	1	4.25	0.89	4.80	0.09	12.3	2.6	0.85	.227	1.95	6.73
4	Blue Moon Odom B. Moon Odom	1.13	4	10	3	1	.750	27	1	1	0	39.2	22	5	7	0	13	0	1	0	150	2	6.13	2.95	2.08	0.00	18.0	8.7	0.88	.200	1.59	4.99
5	Ian Anderson I. Anderson	1.26	8	8	4	0	1.000	40	0	0	0	35.2	20	5	5	1	17	2	0	0	145	1	10.09	4.29	2.35	0.25	27.6	11.7	1.04	.224	1.26	5.05
6	Eddie Plank E. Plank	1.32	6	7	2	5	.286	32	6	0	0	54.2	36	8	11	0	11	4	1	1	215	1	5.27	1.81	2.91	0.00	14.9	5.1	0.86	.214	1.81	5.93
7	Pete Schourek P. Schourek	1.35	4	4	1	1	.500	19	0	0	0	26.2	21	4	4	1	10	0	0	0	108	1	6.41	3.38	1.90	0.34	17.6	9.3	1.16	.256	1.35	7.09
8	Bill Hallahan B. Hallahan	1.36	5	7	3	1	.750	27	3	2	1	39.2	29	6	6	0	23	1	1	1	172	1	6.13	5.22	1.17	0.00	15.7	13.4	1.31	.240	1.36	6.58
9	Jon Matlack J. Matlack	1.40	4	4	2	2	.500	20	1	1	0	25.2	12	4	7	2	8	1	0	0	98	0	7.01	2.81	2.50	0.70	20.4	8.2	0.78	.149	2.45	4.21
10	Stephen Strasburg S. Strasburg	1.46	8	9	6	2	.750	71	0	0	0	55.1	44	9	13	4	8	1	0	1	218	1	11.55	1.30	8.88	0.65	32.6	3.7	0.94	.299	2.11	7.16
11	Ranger Suárez R. Suárez	1.48	8	11	4	1	.800	44	0	0	1	42.2	32	7	8	3	13	1	1	0	173	0	9.28	2.74	3.38	0.63	25.4	7.5	1.05	.259	1.69	6.75
12	Mickey Lolich M. Lolich	1.57	5	5	3	1	.750	31	3	0	0	46.0	34	8	9	3	11	1	0	0	180	0	6.07	2.15	2.82	0.59	17.2	6.1	0.98	.231	1.76	6.65
13	George Earnshaw G. Earnshaw	1.58	8	8	4	3	.571	56	5	1	0	62.2	39	11	14	2	17	0	0	1	245	1	8.04	2.44	3.29	0.29	22.9	6.9	0.89	.218	2.01	5.60
14	Spud Chandler S. Chandler	1.62	4	6	2	2	.500	16	2	1	1	33.1	28	6	8	0	9	0	1	0	133	0	4.32	2.43	1.78	0.00	12.0	6.8	1.11	.259	2.16	7.56
15	Scott McGregor S. McGregor	1.63	6	6	3	3	.500	26	3	2	0	49.2	37	9	10	3	8	0	0	2	189	0	4.71	1.45	3.25	0.54	13.8	4.2	0.91	.224	1.81	6.70
16	Matthew Boyd M. Boyd	1.66	6	7	0	1	.000	23	0	0	0	21.2	18	4	8	0	12	1	0	0	95	0	9.55	4.98	1.92	0.00	24.2	12.6	1.38	.305	3.32	7.48
17	Jesse Haines J. Haines	1.67	4	6	3	1	.750	12	2	1	0	32.1	24	6	9	3	16	0	1	1	133	1	3.34	4.45	0.75	0.84	9.0	12.0	1.24	.206	2.51	6.68
18	Max Lanier M. Lanier	1.71	4	7	2	1	.667	25	0	0	0	31.2	24	6	10	1	12	0	2	1	132	2	7.11	3.41	2.08	0.28	18.9	9.1	1.14	.245	2.84	6.82
19	Stan Coveleski S. Coveleski	1.74	5	5	3	2	.600	11	4	1	0	41.1	31	8	9	2	7	0	0	0	162	0	2.40	1.52	1.57	0.44	6.8	4.3	0.92	.204	1.96	6.75
20	Lefty Grove L. Grove	1.75	5	8	4	2	.667	36	4	0	2	51.1	46	10	12	0	6	0	3	0	205	0	6.31	1.05	6.00	0.00	17.6	2.9	1.01	.282	2.10	8.06
21	Orval Overall O. Overall	1.75	5	8	3	1	.750	35	3	1	0	51.1	37	10	11	0	15	1	2	0	203	2	6.14	2.63	2.33	0.00	17.2	7.4	1.01	.243	1.93	6.49
22	Sterling Hitchcock S. Hitchcock	1.76	4	9	4	0	1.000	41	0	0	0	30.2	23	6	8	4	11	1	1	2	123	2	12.03	3.23	3.73	1.17	33.3	8.9	1.11	.288	2.35	6.75
23	Carl Hubbell C. Hubbell	1.79	6	6	4	2	.667	32	4	0	0	50.1	40	10	18	3	12	1	0	2	204	1	5.72	2.15	2.67	0.54	15.7	5.9	1.03	.237	3.22	7.15
24	Ernie Shore E. Shore	1.82	4	4	3	1	.750	15	3	0	0	34.2	24	7	10	0	12	1	0	0	137	0	3.89	3.12	1.25	0.00	10.9	8.8	1.04	.220	2.60	6.23
25	Waite Hoyt W. Hoyt	1.83	11	12	6	4	.600	49	6	1	0	83.2	81	17	28	2	22	1	1	0	345	0	5.27	2.37	2.23	0.22	14.2	6.4	1.23	.292	3.01	8.71