how many different players with at least 45 homeruns in a season

Babe Ruth went deep 54 times in 1920.

	NAME	HR	SEASON	TM	G	AB	R	H	2B	3B	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	GIDP	AVG	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Babe Ruth B. Ruth	54	1920	NYY	142	458	158	172	36	9	135	150	3	80	14	14	616	388	99	5			.376	.532	.847	1.379	191	120.9	.597	237	110.5
2	Babe Ruth B. Ruth	59	1921	NYY	152	540	177	204	44	16	168	145	4	81	17	13	693	457	119	4			.378	.512	.846	1.359	214	127.8	.575	224	118.7
3	Babe Ruth B. Ruth	46	1924	NYY	153	529	143	200	39	7	124	142	4	81	9	13	681	391	92	6			.378	.513	.739	1.252	193	109.2	.549	210	102
4	Babe Ruth B. Ruth	47	1926	NYY	152	495	139	184	30	5	153	144	3	76	11	9	652	365	82	10			.372	.516	.737	1.253	184	105.6	.551	216	100.6
5	Lou Gehrig L. Gehrig	47	1927	NYY	155	584	149	218	52	18	173	109	3	84	10	8	717	447	117	21			.373	.474	.765	1.240	199	110.9	.540	209	105.6
6	Babe Ruth B. Ruth	60	1927	NYY	151	540	158	192	29	8	165	137	0	89	7	6	691	417	97	14			.356	.486	.772	1.258	195	109.9	.545	212	104.8
7	Babe Ruth B. Ruth	54	1928	NYY	154	536	163	173	29	8	146	137	3	87	4	5	684	380	91	8			.323	.463	.709	1.172	174	90.6	.510	201	89.3
8	Babe Ruth B. Ruth	46	1929	NYY	135	499	121	172	26	6	154	72	3	60	5	3	587	348	78	13			.345	.430	.697	1.128	144	66.1	.486	185	67.7
9	Babe Ruth B. Ruth	49	1930	NYY	145	518	150	186	28	9	153	136	1	61	10	10	676	379	86	21			.359	.493	.732	1.225	192	97	.517	204	100.6
10	Hack Wilson H. Wilson	56	1930	CHC	155	585	146	208	35	6	191	105	1	84	3		709	423	97	18			.356	.454	.723	1.177	189	89	.497	171	78.9
11	Lou Gehrig L. Gehrig	46	1931	NYY	155	619	163	211	31	15	185	117	0	56	17	12	738	410	92	2			.341	.446	.662	1.108	179	87.7	.488	184	83.8
12	Babe Ruth B. Ruth	46	1931	NYY	145	534	149	199	31	3	162	128	1	51	5	4	663	374	80	0			.373	.495	.700	1.195	181	98.6	.525	206	95.1
13	Jimmie Foxx J. Foxx	58	1932	PHA	154	585	151	213	33	9	169	116	0	96	3	7	701	438	100	0			.364	.469	.749	1.218	193	105.6	.522	198	95.8
14	Jimmie Foxx J. Foxx	48	1933	PHA	149	573	125	204	37	9	163	96	1	93	2	2	670	403	94	0			.356	.449	.703	1.153	170	92.1	.510	189	79.8
15	Lou Gehrig L. Gehrig	49	1934	NYY	154	579	128	210	40	6	166	109	2	31	9	5	690	409	95	0			.363	.465	.706	1.172	182	94.8	.511	194	90.9
16	Lou Gehrig L. Gehrig	49	1936	NYY	155	579	167	205	37	7	152	130	7	46	3	4	719	403	93	3			.354	.478	.696	1.174	192	97.6	.512	178	85.8
17	Joe DiMaggio J. DiMaggio	46	1937	NYY	151	621	151	215	35	15	167	64	5	37	3	0	692	418	96	2			.346	.412	.673	1.085	160	73.6	.474	165	64.8
18	Jimmie Foxx J. Foxx	50	1938	BSA	149	565	139	197	33	9	175	119	0	76	5	4	685	398	92	1			.349	.462	.704	1.166	178	91.7	.508	173	74.2
19	Hank Greenberg H. Greenberg	58	1938	DET	155	556	143	175	23	4	147	119	3	92	7	5	681	380	85	3			.315	.438	.683	1.122	166	80.3	.489	162	62
20	Ralph Kiner R. Kiner	51	1947	PIT	152	565	118	177	23	4	127	98	2	81	1		666	361	78	1		12	.313	.417	.639	1.055	145	69.5	.472	169	58.2
21	Johnny Mize J. Mize	51	1947	NYG	154	586	137	177	26	2	138	74	4	42	2		664	360	79	0		6	.302	.384	.614	.998	132	57.1	.448	156	47.4
22	Ralph Kiner R. Kiner	54	1949	PIT	152	549	116	170	19	5	127	117	1	61	6		667	361	78	0		10	.310	.432	.658	1.089	153	73.4	.484	179	65.8
23	Ralph Kiner R. Kiner	47	1950	PIT	150	547	112	149	21	6	118	122	3	79	2		672	323	74	0		22	.272	.408	.590	.998	136	52	.441	152	44.9
24	Eddie Mathews E. Mathews	47	1953	MIL	157	579	110	175	31	8	135	99	2	83	1	3	681	363	86	1		6	.302	.406	.627	1.033	144	62.6	.451	168	60.8
25	Ted Kluszewski T. Kluszewski	49	1954	CIN	149	573	104	187	28	3	141	78	3	35	0	2	659	368	80	0	5	12	.326	.407	.642	1.049	140	65.5	.461	164	54