most er by a pitcher in a season after 1900

Since 1901, Bobo Newsom has given up the most earned runs in a season, with 186 earned runs in 1938.

	NAME	ER	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	H	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Bobo Newsom B. Newsom	186	1938	SLA	44	20	16	.556	40	5.08	226	31	0	1	329.2	334	205	30	192	5	3		1,475	3	6.17	5.24	1.18	0.82	15.3	13.0	1.60	.297	5.60	101	4.53	94	9.12	11.6
2	Snake Wiltse S. Wiltse	172	1902	TOT	38	15	19	.441	35	5.13	65	31	0	1	302.0	397	226	11	92	13	3		1,358	10	1.94	2.74	0.71	0.33	4.8	6.8	1.62	.328	6.74	138	3.75	105	11.83	-4.2
3	Dickey Kerr D. Kerr	162	1921	CWS	44	19	17	.528	37	4.72	80	25	3	1	308.2	357	182	12	96	11	5		1,360	5	2.33	2.80	0.83	0.35	5.9	7.1	1.47	.297	5.31	111	4.13	100	10.41	-0.3
4	Jack Knott J. Knott	156	1936	SLA	47	9	17	.346	23	7.29	60	9	0	6	192.2	272	174	15	93	4	16		929	11	2.80	4.34	0.65	0.70	6.5	10.0	1.89	.339	8.13	138	5.16	102	12.71	-1.5
5	Guy Bush G. Bush	155	1930	CHC	46	15	10	.600	25	6.20	75	11	0	3	225.0	291	174	22	86	2	8		1,031	12	3.00	3.44	0.87	0.88	7.3	8.3	1.68	.318	6.96	126	5.28	108	11.64	-10.5
6	Ray Kremer R. Kremer	154	1930	PIT	39	20	12	.625	38	5.02	58	18	1	0	276.0	366	181	29	63	1	1		1,232	3	1.89	2.05	0.92	0.95	4.7	5.1	1.55	.312	5.90	100	5.14	103	11.93	-4.9
7	Wes Ferrell W. Ferrell	153	1937	TOT	37	14	19	.424	35	4.90	123	26	0	0	281.0	325	177	25	122	3	2		1,266	2	3.94	3.91	1.01	0.80	9.7	9.6	1.59	.302	5.67	108	4.66	105	10.41	-7.5
8	Pat Caraway P. Caraway	152	1931	CWS	51	10	24	.294	32	6.22	55	11	1	2	220.0	268	177	17	101	7	12		1,035	4	2.25	4.13	0.54	0.70	5.3	9.8	1.68	.294	7.24	146	5.09	124	10.96	-25.2
9	Joe McGinnity J. McGinnity	151	1901	BAL	48	26	20	.565	43	3.56	75	39	1	1	382.0	412	219	7	96	21	4		1,631	5	1.77	2.26	0.78	0.16	4.6	5.9	1.33	.283	5.16	93	3.69	96	9.71	10
10	George Uhle G. Uhle	150	1923	CLE	54	26	16	.619	44	3.77	109	30	1	5	357.2	378	167	8	102	12	8		1,548	3	2.74	2.57	1.07	0.20	7.0	6.6	1.34	.281	4.20	94	3.57	88	9.51	19.2
11	Bump Hadley B. Hadley	149	1932	TOT	43	14	21	.400	35	5.40	145	13	1	2	248.1	261	168	23	171	8	5		1,155	5	5.26	6.20	0.85	0.83	12.6	14.8	1.74	.295	6.09	114	5.22	113	9.46	-14.7
12	Phil Niekro P. Niekro	148	1977	ATL	44	16	20	.444	43	4.03	262	20	2	0	330.1	315	166	26	164	8	1	12	1,428	17	7.14	4.47	1.60	0.71	18.3	11.5	1.45	.299	4.52	95	3.73	88	8.58	18.1
13	Robin Roberts R. Roberts	147	1956	PHI	43	19	18	.514	37	4.45	157	22	1	3	297.1	328	155	46	40	2	6	3	1,228	2	4.75	1.21	3.93	1.39	12.8	3.3	1.24	.287	4.69	119	3.75	97	9.93	3.8
14	Bobo Newsom B. Newsom	147	1937	TOT	41	16	14	.533	37	4.81	166	17	1	0	275.1	269	163	18	167	6	2		1,247	6	5.43	5.46	0.99	0.59	13.3	13.4	1.58	.282	5.33	103	4.57	99	8.79	1.4
15	Sam Gray S. Gray	146	1931	SLA	43	11	24	.314	37	5.09	88	13	0	2	258.0	323	187	20	54	4	5		1,158	4	3.07	1.88	1.63	0.70	7.6	4.7	1.46	.305	6.52	111	4.11	92	11.27	10.3
16	George Earnshaw G. Earnshaw	146	1930	PHA	49	22	13	.629	39	4.44	193	20	3	2	296.0	299	162	20	139	1	6		1,299	10	5.87	4.23	1.39	0.61	14.9	10.7	1.48	.295	4.93	93	4.49	93	9.09	11.8
17	Jose Lima J. Lima	145	2000	HOU	33	7	16	.304	33	6.65	124	0	0	0	196.1	251	152	48	68	2	0	3	895	3	5.68	3.12	1.82	2.20	13.9	7.6	1.62	.311	6.97	138	6.11	129	11.51	-29.2
18	Pedro Astacio P. Astacio	145	1998	COL	35	13	14	.481	34	6.23	170	0	0	0	209.1	245	160	39	74	17	0	0	938	2	7.31	3.18	2.30	1.68	18.1	7.9	1.52	.323	6.88	119	5.23	110	10.53	-8.7
19	Harry Byrd H. Byrd	145	1953	PHA	40	11	20	.355	37	5.51	122	11	2	0	236.2	279	155	23	115	14	0		1,090	6	4.64	4.37	1.06	0.87	11.2	10.6	1.66	.314	5.89	134	4.46	108	10.61	-7.7
20	Herm Wehmeier H. Wehmeier	145	1950	CIN	41	10	18	.357	32	5.67	121	12	0	4	230.0	255	157	27	135	4	7		1,058	11	4.73	5.28	0.90	1.06	11.4	12.8	1.70	.296	6.14	136	4.87	113	9.98	-14
21	Bill Phillips B. Phillips	145	1901	CIN	37	14	18	.438	36	4.64	109	29	1	0	281.1	364	196	7	67	12	1		1,250	3	3.49	2.14	1.63	0.22	8.7	5.4	1.53	.338	6.27	138	3.32	99	11.64	1.3
22	Nels Potter N. Potter	144	1939	PHA	41	8	12	.400	25	6.60	60	9	0	2	196.1	258	163	26	88	5	12		922	12	2.75	4.03	0.68	1.19	6.5	9.5	1.76	.312	7.47	143	5.50	124	11.83	-22.9
23	James DeShong J. DeShong	144	1937	WSH	37	14	15	.483	34	4.90	86	20	0	1	264.1	290	161	15	124	3	3		1,179	3	2.93	4.22	0.69	0.51	7.3	10.5	1.57	.289	5.48	112	4.57	106	9.87	-9.1
24	Rube Walberg R. Walberg	143	1932	PHA	41	17	10	.630	34	4.73	96	19	3	1	272.0	305	159	16	103	0	4		1,203	5	3.18	3.41	0.93	0.53	8.0	8.6	1.50	.293	5.26	106	4.21	96	10.09	4.8
25	Ray Benge R. Benge	143	1930	PHN	38	11	15	.423	29	5.70	70	14	0	1	225.2	305	178	22	81	1	4		1,055	5	2.79	3.23	0.86	0.88	6.6	7.7	1.71	.321	7.10	104	5.24	97	12.16	5.9