pitcher low era by day of week, min 200 ip, since 1930

Since 1930, Mariano Rivera has the lowest ERA when pitching at least 200 innings, with an ERA of 1.39 on Wednesdays.

	NAME	ERA	IP	WEEKDAY	G	W	L	W%	GS	SO	CG	SHO	SV	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	Mariano Rivera M. Rivera	1.39	213.2	Wednesday	186	11	5	.688	1	182	0	0	118	129	33	38	6	40	6	168	6	797	1	7.67	1.68	4.55	0.25	22.8	5.0	0.79	.218	1.60	5.43
2	Dean Chance D. Chance	1.87	207.1	Monday	40	16	8	.667	26	158	10	7	2	163	43	63	10	56	5	8	10	829	3	6.86	2.43	2.82	0.43	19.1	6.8	1.06	.255	2.73	7.08
3	Jon Matlack J. Matlack	1.96	363.1	Saturday	51	25	9	.735	46	252	23	7	2	288	79	95	15	97	3	4	8	1,431	9	6.24	2.40	2.60	0.37	17.6	6.8	1.06	.257	2.35	7.13
4	Hoyt Wilhelm H. Wilhelm	1.98	514.1	Sunday	232	28	21	.571	12	363	6	2	54	387	113	140	24	143	9	139	15	2,042	14	6.35	2.50	2.54	0.42	17.8	7.0	1.03	.242	2.45	6.77
5	Rich Gossage R. Gossage	2.03	284.1	Tuesday	155	22	11	.667	4	226	4	0	55	212	64	71	13	101	7	110	12	1,140	8	7.15	3.20	2.24	0.41	19.8	8.9	1.10	.251	2.25	6.71
6	Jacob deGrom J. deGrom	2.06	253.0	Wednesday	41	15	9	.625	41	311	0	0	0	173	58	59	21	63	4	0	4	980	7	11.06	2.24	4.94	0.75	31.7	6.4	0.93	.262	2.10	6.15
7	Mort Cooper M. Cooper	2.18	219.0	Friday	30	14	9	.609	27	106	16	5	1	168	53	59	11	58	0	3		859	1	4.36	2.38	1.83	0.45	12.3	6.8	1.03	.230	2.42	6.90
8	Chris Sale C. Sale	2.19	229.2	Monday	42	17	5	.773	31	252	2	0	1	188	56	63	22	42	12	4	1	901	2	9.88	1.65	6.00	0.86	28.0	4.7	1.00	.290	2.47	7.37
9	Whitey Ford W. Ford	2.21	611.0	Friday	91	46	18	.719	86	393	35	10	1	490	150	184	41	222	3	4		2,482	11	5.79	3.27	1.77	0.60	15.8	8.9	1.17	.246	2.71	7.22
10	Sparky Lyle S. Lyle	2.23	222.0	Tuesday	128	20	8	.714	0	141	0	0	34	179	55	60	14	65	2	97	5	882	8	5.72	2.64	2.17	0.57	16.0	7.4	1.10	.250	2.43	7.26
11	Bob Grim B. Grim	2.24	201.0	Sunday	61	20	7	.741	14	105	4	3	6	168	50	62	3	82	3	30	8	832	5	4.70	3.67	1.28	0.13	12.6	9.9	1.24	.258	2.78	7.52
12	Clayton Kershaw C. Kershaw	2.28	312.1	Thursday	50	26	10	.722	50	342	4	2	0	247	79	84	19	93	3	0	5	1,239	14	9.85	2.68	3.68	0.55	27.6	7.5	1.09	.292	2.42	7.12
13	Dizzy Dean D. Dean	2.29	240.0	Wednesday	39	18	10	.643	27	127	21	3	4	197	61	72	10	62	3	12		958	1	4.76	2.33	2.05	0.38	13.3	6.5	1.08	.247	2.70	7.39
14	Lefty Grove L. Grove	2.29	283.0	Thursday	43	25	8	.758	31	145	26	3	6	247	72	80	10	72	4	11		1,143	2	4.61	2.29	2.01	0.32	12.7	6.3	1.13	.260	2.54	7.86
15	Juan Marichal J. Marichal	2.30	650.0	Tuesday	81	49	28	.636	79	422	51	12	0	519	166	214	51	132	10	2	19	2,590	10	5.84	1.83	3.20	0.71	16.3	5.1	1.00	.237	2.96	7.19
16	Jacob deGrom J. deGrom	2.32	283.0	Friday	45	19	11	.633	45	339	1	1	0	197	73	77	29	55	8	0	2	1,086	5	10.78	1.75	6.16	0.92	31.2	5.1	0.89	.256	2.45	6.27
17	Don Drysdale D. Drysdale	2.35	587.0	Wednesday	82	37	24	.607	79	398	31	9	1	493	153	185	40	147	27	1	19	2,371	15	6.10	2.25	2.71	0.61	16.8	6.2	1.09	.258	2.84	7.56
18	Clayton Kershaw C. Kershaw	2.37	462.1	Sunday	74	36	9	.800	72	513	6	3	0	345	122	133	37	120	13	0	9	1,821	17	9.99	2.34	4.28	0.72	28.2	6.6	1.01	.271	2.59	6.72
19	Wilbur Wood W. Wood	2.39	305.1	Thursday	72	20	14	.588	32	163	12	5	6	286	81	94	21	73	2	20	8	1,243	8	4.80	2.15	2.23	0.62	13.1	5.9	1.18	.269	2.77	8.43
20	Clayton Kershaw C. Kershaw	2.41	374.0	Wednesday	60	28	11	.718	59	423	3	2	0	273	100	112	34	93	4	0	2	1,472	14	10.18	2.24	4.55	0.82	28.7	6.3	0.98	.260	2.70	6.57
21	Max Lanier M. Lanier	2.41	291.2	Tuesday	53	19	12	.613	37	139	17	7	2	235	78	90	7	118	2	7		1,191	1	4.29	3.64	1.18	0.22	11.7	9.9	1.21	.246	2.78	7.25
22	Larry Jackson L. Jackson	2.41	246.2	Monday	40	14	10	.583	31	145	16	5	3	204	66	75	10	55	5	6	4	983	2	5.29	2.01	2.64	0.36	14.8	5.6	1.05	.253	2.74	7.44
23	Clayton Kershaw C. Kershaw	2.41	279.2	Monday	41	25	6	.806	41	278	6	3	0	202	75	80	25	46	1	0	0	1,069	12	8.95	1.48	6.04	0.80	26.0	4.3	0.89	.246	2.57	6.50
24	Carl Hubbell C. Hubbell	2.42	267.1	Monday	42	19	11	.633	28	146	20	3	5	221	72	83	11	71	4	12		1,076	6	4.92	2.39	2.06	0.37	13.6	6.6	1.09	.249	2.79	7.44
25	Stan Williams S. Williams	2.42	245.0	Wednesday	62	15	7	.682	29	192	9	2	6	182	66	74	13	110	7	18	9	1,024	10	7.05	4.04	1.75	0.48	18.8	10.7	1.19	.241	2.72	6.69