MLB leaders era all- time since 1920

	NAME	ERA	SEAS	G	W	L	W%	GS	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Jose Acosta J. Acosta	4.51	3	55	10	10	.500	13	45	6	1	4	213.1	265	107	119	9	68	0	28	933	4	1.90	2.87	0.66	0.38	4.8	7.3	1.56	.316	5.02	115	4.04	106	11.18	-6
2	Babe Adams B. Adams	3.36	7	174	63	45	.583	107	246	57	14	10	930.2	993	347	408	32	104	9	41	3,830	8	2.38	1.01	2.37	0.31	6.4	2.7	1.18	.279	3.95	87	3.23	84	9.60	62.2
3	Eddie Ainsmith E. Ainsmith		5
4	Grover Alexander G. Alexander	3.09	11	334	165	108	.604	293	659	194	20	16	2437.0	2,568	838	1,006	116	355	15	31	10,002	18	2.43	1.31	1.86	0.43	6.6	3.5	1.20	.277	3.72	78	3.51	88	9.48	124.2
5	Nick Allen N. Allen		1
6	Ernie Alten E. Alten	9.00	1	14	0	1	.000	1	4	0	0	0	23.0	40	23	27	2	9	1	7	112	0	1.57	3.52	0.44	0.78	3.6	8.0	2.13	.396	10.57	240	4.84	134	15.65	-3.2
7	Jimmy Austin J. Austin		7
8	Doc Ayers D. Ayers	3.98	2	48	7	14	.333	24	103	8	3	1	212.2	226	94	121	6	64	8	17	867	1	4.36	2.71	1.61	0.25	11.9	7.4	1.36	.321	5.12	106	3.17	88	9.56	10.4
9	Jim Bagby J. Bagby	4.10	4	134	52	31	.627	80	151	49	3	8	698.1	805	318	360	34	187	13	43	2,968	6	1.95	2.41	0.81	0.44	5.1	6.3	1.42	.298	4.64	101	3.96	100	10.37	-1.9
10	Gene Bailey G. Bailey		3
11	Sweetbread Bailey S. Bailey	6.14	2	31	1	2	.333	1	16	0	0	0	66.0	96	45	55	2	20	4	18	306	3	2.18	2.73	0.80	0.27	5.2	6.5	1.76	.356	7.50	184	3.91	111	13.09	-2.7
12	Doug Baird D. Baird		1
13	Dave Bancroft D. Bancroft		11
14	Walter Barbare W. Barbare		3
15	Turner Barber T. Barber		4
16	Jesse Barnes J. Barnes	3.62	8	283	99	104	.488	215	371	116	15	11	1716.0	1,914	690	845	74	370	11	43	7,258	14	1.95	1.94	1.00	0.39	5.1	5.1	1.33	.286	4.43	97	3.77	101	10.04	-9.8
17	Virgil Barnes V. Barnes	3.63	8	204	61	59	.508	133	274	58	7	10	1092.0	1,186	441	521	46	292	8	32	4,631	9	2.26	2.41	0.94	0.38	5.9	6.3	1.35	.284	4.29	94	3.88	99	9.77	1
18	Clyde Barnhart C. Barnhart		9
19	Harry Baumgartner H. Baumgartner	4.00	1	9	0	1	.000	0	7	0	0	0	18.0	18	8	10	1	6	0	6	72	0	3.50	3.00	1.17	0.50	9.7	8.3	1.33	.293	5.00	107	3.69	103	9.00	-0.2
20	Bill Bayne B. Bayne	4.83	8	197	30	31	.492	53	259	20	2	8	650.0	695	349	401	37	291	50	78	2,882	6	3.59	4.03	0.89	0.51	9.0	10.1	1.52	.293	5.55	115	4.51	109	9.62	-24.4
21	Rube Benton R. Benton	3.32	5	149	44	47	.484	95	200	42	7	5	793.2	885	293	374	25	163	13	28	3,375	14	2.27	1.85	1.23	0.28	5.9	4.8	1.32	.289	4.24	91	3.53	95	10.04	14.1
22	Huck Betts H. Betts	3.93	10	307	61	68	.473	125	323	53	8	16	1366.1	1,581	596	716	83	321	23	128	5,906	12	2.13	2.11	1.01	0.55	5.5	5.4	1.39	.291	4.72	102	4.06	104	10.41	-22.9
23	Harry Biemiller H. Biemiller	4.22	2	28	1	1	.500	3	19	1	0	2	64.0	66	30	41	3	34	7	11	276	3	2.67	4.78	0.56	0.42	6.9	12.3	1.56	.296	5.77	107	4.95	126	9.28	-7.7
24	Carson Bigbee C. Bigbee		7
25	Lyle Bigbee L. Bigbee	6.96	2	17	0	3	.000	2	13	0	0	0	53.0	70	41	43	5	29	0	10	234	3	2.21	4.92	0.45	0.85	5.6	12.4	1.87	.348	7.30	177	5.18	136	11.89	-7.7