most home runs allowed by a starting pitcher single season

Bert Blyleven has allowed the most home runs by a starting pitcher in a season, with 50 HR in 1986.

	NAME	HR	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Bert Blyleven B. Blyleven	50	1986	MIN	36	17	14	.548	36	4.01	215	16	3	0	271.2	262	121	134	58	10	0	4	1,126	4	7.12	1.92	3.71	1.66	19.1	5.2	1.18	.267	4.44	8.68
2	Jose Lima J. Lima	48	2000	HOU	33	7	16	.304	33	6.65	124	0	0	0	196.1	251	145	152	68	2	0	3	895	3	5.68	3.12	1.82	2.20	13.9	7.6	1.62	.311	6.97	11.51
3	Bronson Arroyo B. Arroyo	46	2011	CIN	32	9	12	.429	32	5.07	108	1	1	0	199.0	227	112	119	45	6	0	5	855	0	4.88	2.04	2.40	2.08	12.6	5.3	1.37	.278	5.38	10.27
4	Bert Blyleven B. Blyleven	46	1987	MIN	37	15	12	.556	37	4.01	196	8	1	0	267.0	249	119	132	101	9	0	4	1,122	13	6.61	3.40	1.94	1.55	17.5	9.0	1.31	.264	4.45	8.39
5	Robin Roberts R. Roberts	46	1956	PHI	37	17	18	.486	37	4.50	149	22	1	0	284.0	312	142	150	37	2	0	3	1,173	1	4.72	1.17	4.03	1.46	12.7	3.2	1.23	.283	4.75	9.89
6	Lance Lynn L. Lynn	44	2023	TOT	32	13	11	.542	32	5.73	191	0	0	0	183.2	189	117	127	67	9	0	1	808	3	9.36	3.28	2.85	2.16	23.6	8.3	1.39	.292	6.22	9.26
7	Eric Milton E. Milton	43	2004	PHI	34	14	6	.700	34	4.75	161	0	0	0	201.0	196	106	110	75	1	0	6	862	3	7.21	3.36	2.15	1.93	18.7	8.7	1.35	.263	4.93	8.78
8	Jamie Moyer J. Moyer	43	2004	SEA	33	7	12	.368	33	5.20	125	1	0	0	199.0	214	115	125	59	11	0	1	873	1	5.65	2.67	2.12	1.94	14.3	6.8	1.37	.269	5.65	9.68
9	Denny McLain D. McLain	42	1966	DET	38	20	14	.588	38	3.92	192	14	4	0	264.1	205	115	120	104	3	0	3	1,080	6	6.54	3.54	1.85	1.43	17.8	9.6	1.17	.221	4.09	6.98
10	Lucas Giolito L. Giolito	41	2023	TOT	33	7	15	.318	33	4.88	204	0	0	0	184.1	169	100	110	73	9	0	2	794	5	9.96	3.56	2.79	2.00	25.7	9.2	1.31	.274	5.37	8.25
11	Mike Leake M. Leake	41	2019	TOT	32	12	11	.522	32	4.29	127	2	1	0	197.0	227	94	114	27	10	0	2	835	2	5.80	1.23	4.70	1.87	15.2	3.2	1.29	.295	5.21	10.37
12	Dylan Bundy D. Bundy	41	2018	BAL	31	8	16	.333	31	5.45	184	1	0	0	171.2	188	104	116	54	6	0	1	750	6	9.65	2.83	3.41	2.15	24.5	7.2	1.41	.316	6.08	9.86
13	Rick Helling R. Helling	41	1999	TEX	35	13	11	.542	35	4.84	131	3	0	0	219.1	228	118	127	85	6	0	5	943	8	5.38	3.49	1.54	1.68	13.9	9.0	1.43	.275	5.21	9.36
14	Phil Niekro P. Niekro	41	1979	ATL	44	21	20	.512	44	3.39	208	23	1	0	342.0	311	129	160	113	11	0	8	1,436	18	5.47	2.97	1.84	1.08	14.5	7.9	1.24	.254	4.21	8.18
15	Robin Roberts R. Roberts	41	1955	PHI	38	23	14	.622	38	3.33	159	26	1	0	302.2	289	112	137	53	2	0	4	1,246	3	4.73	1.58	3.00	1.22	12.8	4.3	1.13	.250	4.07	8.59
16	James Shields J. Shields	40	2016	TOT	33	6	19	.240	33	5.85	135	1	0	0	181.2	208	118	122	82	8	0	3	822	10	6.69	4.06	1.65	1.98	16.4	10.0	1.60	.302	6.04	10.30
17	Eric Milton E. Milton	40	2005	CIN	34	8	15	.348	34	6.47	123	0	0	0	186.1	237	134	141	52	7	0	2	855	8	5.94	2.51	2.37	1.93	14.4	6.1	1.55	.311	6.81	11.45
18	Ramon Ortiz R. Ortiz	40	2002	ANA	32	15	9	.625	32	3.77	162	4	1	0	217.1	188	91	97	68	5	0	0	896	7	6.71	2.82	2.38	1.66	18.1	7.6	1.18	.238	4.02	7.79
19	Brad Radke B. Radke	40	1996	MIN	35	11	16	.407	35	4.46	148	3	0	0	232.0	231	115	125	57	4	0	2	973	1	5.74	2.21	2.60	1.55	15.2	5.9	1.24	.264	4.85	8.96
20	Bill Gullickson B. Gullickson	40	1987	TOT	35	14	13	.519	35	4.86	117	4	1	0	213.0	218	115	128	50	3	0	7	896	4	4.94	2.11	2.34	1.69	13.1	5.6	1.26	.259	5.41	9.21
21	Jack Morris J. Morris	40	1986	DET	35	21	8	.724	35	3.27	223	15	6	0	267.0	229	97	105	82	0	0	7	1,092	12	7.52	2.76	2.72	1.35	20.4	7.5	1.16	.253	3.54	7.72
22	Fergie Jenkins F. Jenkins	40	1979	TEX	37	16	14	.533	37	4.07	164	10	3	0	259.0	252	117	127	81	3	0	6	1,089	4	5.70	2.81	2.02	1.39	15.1	7.4	1.29	.265	4.41	8.76
23	Phil Niekro P. Niekro	40	1970	ATL	32	11	18	.379	32	4.38	163	10	3	0	224.0	216	109	124	67	6	0	2	957	5	6.55	2.69	2.43	1.61	17.0	7.0	1.26	.258	4.98	8.68
24	Pedro Ramos P. Ramos	40	1957	WSH	30	8	14	.364	30	4.98	75	7	1	0	195.1	215	108	114	59	5	0	2	839	1	3.46	2.72	1.27	1.84	8.9	7.0	1.40	.265	5.25	9.91
25	Jordan Lyles J. Lyles	39	2023	KCR	31	6	17	.261	31	6.28	120	3	0	0	177.2	176	124	130	45	6	0	0	748	10	6.08	2.28	2.67	1.98	16.0	6.0	1.24	.255	6.59	8.92