235 times MLB teams hit at least 200 Home Runs in a season. 307 is the record.

Johnny Mize

Position: First Baseman

Bats: Left  •  Throws: Right

6-2, 215lb (188cm, 97kg)

Born: January 7, 1913 in Demorest, GA us

Died: June 2, 1993 (Aged 80-146d) in Demorest, GA

Click the following link to view all 235:

https://stathead.com/tiny/ugxL9

300 HR:

Rk	Season	Team	Lg	HR	GP	W	L	WL%	Bat#	PA	AB	R	H	1B	2B	3B	SB	SO	BA	OBP	SLG	OPS	OPS+	TB
1	2023	ATL	NL	307	162	104	58	.642	23	6249	5597	947	1543	920	293	23	132	1289	.276	.344	.501	.845	124	2803
2	2019	MIN	AL	307	162	101	61	.623	39	6392	5732	939	1547	899	318	23	28	1334	.270	.338	.494	.832	118	2832
3	2019	NYY	AL	306	162	103	59	.636	39	6245	5583	943	1493	880	290	17	55	1437	.267	.339	.490	.829	118	2735

In 2023 13 of 30 teams hit at least 200 Home Runs.

First ten times:

Rk	Season ▲	Team	Lg	HR	GP	W	L	WL%	Bat#	PA	AB	R	H	1B	2B	3B	SB	SO	BA	OBP	SLG	OPS	OPS+	TB
1	1947	NYG	NL	221	155	81	73	.526	41	5927	5343	830	1446	957	220	48	29	570	.271	.335	.454	.789	107	2425
2	1953	BRO	NL	208	155	105	49	.682	32	6138	5373	955	1529	988	274	59	90	686	.285	.366	.474	.840	114	2545
3	1956	CIN	NL	221	155	91	63	.591	39	6009	5291	775	1406	952	201	32	45	760	.266	.336	.441	.777	103	2334
4	1961	NYY	AL	240	163	109	53	.673	36	6243	5559	827	1461	987	194	40	28	785	.263	.330	.442	.771	109	2455
5	1962	DET	AL	209	161	85	76	.528	37	6236	5456	758	1352	916	191	36	69	894	.248	.330	.411	.740	95	2242
6	1963	MIN	AL	225	161	91	70	.565	39	6234	5531	767	1408	925	223	35	32	912	.255	.325	.430	.754	108	2376
7	1964	MIN	AL	221	163	79	83	.488	44	6320	5610	737	1413	919	227	46	46	1019	.252	.322	.427	.749	106	2395
8	1966	ATL	NL	207	163	85	77	.525	44	6286	5617	782	1476	1017	220	32	59	913	.263	.326	.424	.750	105	2381
9	1973	ATL	NL	206	162	76	85	.472	43	6384	5631	799	1497	1038	219	34	84	870	.266	.339	.427	.765	105	2402
10	1977	BOS	AL	213	161	97	64	.602	23	6184	5510	859	1551	1024	258	56	66	905	.281	.345	.465	.810	108	2560

The 1947 Giants were led by Johnny Mize who hit 51 HR with only 42 SO. They broke the record of 182 by the 1936 Yankees led by Lou Gehrig hitting 49 for the second time. 1956 Reds also hit 221 HR in fewer AB than the Giants.

The schedule increased from 154 games to 162:

AL in 1961

NL in 1962.

		HR	AB	AB/HR
1947	Giants	221	5,343	24.18
1956	Reds	221	5,291	23.94
1961	Yankee	240	5,559	23.16

AB/HR: lower is better.

Note added 8/30/2024:

1961 Yankees hit 229 HR in their first 154 games. They played one tie game for a total of 163 games. Maris hit #61 in game 163.

1956 Reds hit their 221 HR in 155 games. They also played one tie game. No HR in game 155.

1947 New York Giants hit their 221 HR in 155 games. They also played one tie game. No HR in game 155.

________________________________

The 1961 Yankees broke the record of 221 in 1961 with 240 HR led by Roger Maris and Mickey Mantle with 61 and 54. They remain the only teammates to hit at least 50 HR in the same season. Maris, of course, broke the season record of Babe Ruth who hit 60 HR in 1927. In 1973 the American League (AL) introduced the Designated Hitter rule. Despite that, the 1961 Yankee record stood 35 years when three AL teams broke it:

Rk	Season	Team	Lg	HR	GP	W	L	WL%	Bat#	PA	AB	R	H	1B	2B	3B	SB	SO	BA	OBP	SLG	OPS	OPS+	TB
1	1961	NYY	AL	240	163	109	53	.673	36	6243	5559	827	1461	987	194	40	28	785	.263	.330	.442	.771	109	2455
2	1996	BAL	AL	257	163	88	74	.543	25	6494	5689	949	1557	972	299	29	76	915	.274	.350	.472	.822	106	2685
3	1996	OAK	AL	243	162	78	84	.481	26	6402	5630	861	1492	945	283	21	58	1114	.265	.344	.452	.796	99	2546
4	1996	SEA	AL	245	161	85	76	.528	27	6518	5668	993	1625	1018	343	19	90	1052	.287	.366	.484	.850	114	2741

55 of the 235 (23%) seasons of 200 HR were through 1999. 2023 Atlanta tied the record of 307 by 2019 Minnesota. In 2019 21 of 30 teams hit at least 200 HR (70%).

Best record: 1998 Yankees: 114-48  .704

Worst record (44 of 235 (19%) under .500): 2019 Baltimore: 54-108  .333; pitchers allowed 305 HR the most ever by far. Next most: 270 by Colorado pitchers, also in 2019.

152 pitching staffs allowed at least 200 HR:

https://stathead.com/tiny/1vhXC

top 10 HR allowed:

Rk	Season	Team	Lg	HR	GP	W	L	WL%	ERA	G	CG	SHO	SV	IP	H	R	SO	ERA+	HR9	BB9
1	2019	BAL	AL	305	162	54	108	.333	5.67	162	0	0	27	1442.2	1544	981	1248	84	1.9	3.5
2	2019	COL	NL	270	162	71	91	.438	5.58	162	1	1	28	1448.2	1576	958	1264	93	1.7	3.7
3	2019	LAA	AL	267	162	72	90	.444	5.12	162	0	0	32	1442.2	1417	868	1404	91	1.7	3.6
4	2019	SEA	AL	260	162	68	94	.420	5.00	162	3	2	34	1439.1	1484	893	1239	88	1.6	3.2
5	2021	BAL	AL	258	162	52	110	.321	5.85	162	1	1	26	1402.1	1518	956	1234	77	1.7	3.6
6	2019	PHI	NL	258	162	81	81	.500	4.53	162	3	1	36	1453.2	1452	794	1392	99	1.6	3.4
7	2016	CIN	NL	258	162	68	94	.420	4.91	162	2	1	28	1442.0	1457	854	1241	87	1.6	4.0
8	2019	DET	AL	250	161	47	114	.292	5.26	161	0	0	31	1433.0	1555	915	1368	91	1.6	3.4
9	2019	NYY	AL	248	162	103	59	.636	4.31	162	1	1	50	1443.0	1374	739	1534	104	1.5	3.2
10	2017	CIN	NL	248	162	68	94	.420	5.17	162	2	1	33	1430.0	1442	869	1300	87	1.6	4.0

Only 2019 Yankees WL% over .500 and it was WAY over; hit 306 HR but allowed 248 HR.