mlb team with the most home runs allowed per game in a season modern era

Since 1900, the Baltimore Orioles have given up the most home runs by a team in a season, with 305 HR in 2019.

	TEAM	HR	G	SEASON	W%	W	L	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Orioles	305	162	2019	.333	54	108	162	5.59	1,248	0	0	27	1443.0	1,544	897	981	561	80	11	6,396	75	7.78	3.50	2.22	1.90	19.5	8.8	1.46	.295	6.12	9.63
2	Rockies	270	162	2019	.438	71	91	162	5.56	1,264	1	1	28	1448.2	1,576	895	958	589	57	33	6,423	63	7.85	3.66	2.15	1.68	19.7	9.2	1.49	.308	5.95	9.79
3	Angels	267	162	2019	.444	72	90	162	5.12	1,404	0	0	32	1442.2	1,417	820	868	576	82	11	6,289	98	8.76	3.59	2.44	1.67	22.3	9.2	1.38	.290	5.41	8.84
4	Mariners	260	162	2019	.420	68	94	162	4.99	1,239	3	2	34	1439.1	1,484	798	893	505	51	25	6,268	75	7.75	3.16	2.45	1.63	19.8	8.1	1.38	.291	5.58	9.28
5	Orioles	258	162	2021	.321	52	110	162	5.84	1,234	1	1	26	1402.0	1,518	910	956	563	68	12	6,252	88	7.92	3.61	2.19	1.66	19.7	9.0	1.48	.305	6.14	9.74
6	Phillies	258	162	2019	.500	81	81	162	4.53	1,392	3	1	36	1453.2	1,452	731	794	546	71	38	6,274	45	8.62	3.38	2.55	1.60	22.2	8.7	1.37	.298	4.92	8.99
7	Reds	258	162	2016	.420	68	94	162	4.91	1,241	2	1	28	1442.0	1,457	786	854	636	78	31	6,348	61	7.75	3.97	1.95	1.61	19.5	10.0	1.45	.290	5.33	9.09
8	Tigers	250	161	2019	.292	47	114	161	5.24	1,368	0	0	31	1433.0	1,555	835	915	536	69	24	6,341	66	8.59	3.37	2.55	1.57	21.6	8.5	1.46	.317	5.75	9.77
9	Yankees	248	162	2019	.636	103	59	162	4.31	1,534	1	1	50	1443.0	1,374	691	739	507	44	12	6,133	55	9.57	3.16	3.03	1.55	25.0	8.3	1.30	.296	4.61	8.57
10	Reds	248	162	2017	.420	68	94	162	5.17	1,300	2	1	33	1430.0	1,442	821	869	631	77	37	6,286	62	8.18	3.97	2.06	1.56	20.7	10.0	1.45	.296	5.47	9.08
11	Nationals	247	162	2021	.401	65	97	162	4.80	1,346	1	0	36	1394.1	1,364	743	820	548	71	46	6,073	43	8.69	3.54	2.46	1.59	22.2	9.0	1.37	.289	5.29	8.80
12	Nationals	245	162	2023	.438	71	91	162	5.02	1,225	0	0	42	1428.1	1,512	797	845	592	66	25	6,285	54	7.72	3.73	2.07	1.54	19.5	9.4	1.47	.305	5.32	9.53
13	Nationals	244	162	2022	.340	55	107	162	5.00	1,220	2	0	28	1411.2	1,469	785	855	558	75	12	6,220	59	7.78	3.56	2.19	1.56	19.6	9.0	1.44	.297	5.45	9.37
14	White Sox	242	162	2017	.414	67	95	162	4.78	1,193	0	0	25	1421.2	1,384	755	820	632	68	36	6,200	67	7.55	4.00	1.89	1.53	19.2	10.2	1.42	.281	5.19	8.76
15	Orioles	242	162	2017	.463	75	87	162	4.97	1,233	1	1	35	1441.0	1,505	795	841	579	60	21	6,293	53	7.70	3.62	2.13	1.51	19.6	9.2	1.45	.302	5.25	9.40
16	Pirates	241	162	2019	.426	69	93	162	5.18	1,443	1	0	31	1440.0	1,511	829	911	584	85	22	6,391	50	9.02	3.65	2.47	1.51	22.6	9.1	1.45	.315	5.69	9.44
17	Rangers	241	162	2019	.481	78	84	162	5.06	1,379	4	1	33	1438.0	1,515	808	878	583	70	11	6,354	68	8.63	3.65	2.37	1.51	21.7	9.2	1.46	.312	5.50	9.48
18	Tigers	241	162	1996	.327	53	109	162	6.38	957	10	4	22	1432.2	1,699	1,015	1,103	784	80	63	6,713	82	6.01	4.93	1.22	1.51	14.3	11.7	1.73	.313	6.93	10.67
19	Twins	239	162	2021	.451	73	89	162	4.83	1,317	1	0	42	1419.1	1,392	762	834	484	62	13	6,080	48	8.35	3.07	2.72	1.52	21.7	8.0	1.32	.290	5.29	8.83
20	Rockies	239	162	2001	.451	73	89	162	5.29	1,058	8	4	26	1430.0	1,522	841	906	598	64	71	6,306	38	6.66	3.76	1.77	1.50	16.8	9.5	1.48	.295	5.70	9.58
21	Royals	239	162	2000	.475	77	85	162	5.48	927	10	3	29	1439.1	1,585	876	930	693	42	35	6,443	77	5.80	4.33	1.34	1.49	14.4	10.8	1.58	.296	5.82	9.91
22	White Sox	238	161	2019	.447	72	89	161	4.90	1,312	6	2	33	1412.2	1,438	769	832	582	51	30	6,159	71	8.36	3.71	2.25	1.52	21.3	9.4	1.43	.302	5.30	9.16
23	Mariners	237	162	2017	.481	78	84	162	4.46	1,244	1	0	39	1440.1	1,399	713	772	490	53	28	6,132	73	7.77	3.06	2.54	1.48	20.3	8.0	1.31	.283	4.82	8.74
24	Rockies	237	162	1999	.444	72	90	162	6.01	1,032	12	1	33	1429.0	1,700	955	1,028	737	60	46	6,574	70	6.50	4.64	1.40	1.49	15.7	11.2	1.71	.325	6.47	10.71
25	Marlins	236	162	2019	.352	57	105	162	4.74	1,378	2	2	27	1444.1	1,340	760	808	615	90	52	6,247	71	8.59	3.83	2.24	1.47	22.1	9.8	1.35	.281	5.03	8.35