highest hr/xbh by a player in a season with a minimum of 40 hr

Harmon Killebrew has the most home runs per extra-base hit with 40+ home runs in a season, with 0.8 in 1964.

	NAME	HR/XBH	HR	XBH	SEASON	TM	G	AB	R	H	2B	3B	RBI	BB	HBP	SO	SB	CS	PA	TB	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Harmon Killebrew H. Killebrew	0.8	49	61	1964	MIN	158	577	95	156	11	1	111	93	8	135	0	0	682	316	0	4	5	15	.270	.377	.548	.924	123	49.9	.404	152	41.6
2	Mark McGwire M. McGwire	0.77	70	91	1998	STL	155	509	130	152	21	0	147	162	6	155	1	0	681	383	0	4	28	8	.299	.470	.752	1.222	176	91.7	.492	205	90.7
3	Sammy Sosa S. Sosa	0.77	66	86	1998	CHC	159	643	134	198	20	0	158	73	1	171	18	9	722	416	0	5	14	20	.308	.377	.647	1.024	146	56.6	.425	159	53.7
4	Hank Aaron H. Aaron	0.75	40	53	1973	ATL	120	392	84	118	12	1	96	68	1	51	1	1	465	252	0	4	13	7	.301	.402	.643	1.045	97	46	.449	176	40.8
5	Roger Maris R. Maris	0.75	61	81	1961	NYY	161	590	132	159	16	4	141	94	7	67	0	0	698	366	0	7	0	16	.269	.372	.620	.993	138	55.9	.424	162	55.1
6	Mark McGwire M. McGwire	0.75	65	87	1999	STL	153	521	118	145	21	1	147	133	2	141	0	0	661	363	0	5	21	12	.278	.424	.697	1.120	150	64.2	.453	169	61.5
7	Frank Howard F. Howard	0.73	44	60	1970	WSH	161	566	90	160	15	1	126	132	2	125	1	2	706	309	0	6	29	23	.283	.416	.546	.962	131	51.6	.413	160	50.3
8	Frank Howard F. Howard	0.72	48	67	1969	WSH	161	592	111	175	17	2	111	102	5	96	1	0	702	340	0	3	19	29	.296	.402	.574	.976	135	59.6	.427	169	55.9
9	Harmon Killebrew H. Killebrew	0.71	45	63	1963	MIN	142	515	88	133	18	0	96	72	3	105	0	0	596	286	0	6	4	16	.258	.349	.555	.904	102	40.1	.394	147	32.2
10	Jim Thome J. Thome	0.71	52	73	2002	CLE	147	480	101	146	19	2	118	122	5	139	1	2	613	325	0	6	18	5	.304	.445	.677	1.122	142	68.3	.461	189	67.1
11	Mark McGwire M. McGwire	0.71	52	73	1996	OAK	130	423	104	132	21	0	113	116	8	112	0	0	548	309	0	1	16	14	.312	.467	.730	1.198	142	71.8	.489	190	68.5
12	Mickey Mantle M. Mantle	0.71	54	76	1961	NYY	153	514	131	163	16	6	128	126	0	112	12	1	646	353	1	5	9	2	.317	.448	.687	1.135	156	79.6	.478	197	78.8
13	Sammy Sosa S. Sosa	0.71	63	89	1999	CHC	162	625	114	180	24	2	141	78	3	171	7	8	712	397	0	6	8	17	.288	.367	.635	1.002	138	45.2	.414	143	41.3
14	Darrell Evans D. Evans	0.7	40	57	1985	DET	151	505	81	125	17	0	94	85	1	85	0	4	594	262	1	2	12	5	.248	.356	.519	.875	96	28.1	.378	137	26.4
15	Kyle Schwarber K. Schwarber	0.7	47	67	2023	PHI	160	585	108	115	19	1	104	126	6	215	0	2	720	277	0	3	5	4	.197	.343	.474	.817	107	19	.350	120	17.5
16	Sammy Sosa S. Sosa	0.7	49	70	2002	CHC	150	556	122	160	19	2	108	103	3	144	2	0	666	330	0	4	15	14	.288	.399	.594	.993	129	49.3	.416	157	47.6
17	Babe Ruth B. Ruth	0.69	41	59	1932	NYY	133	457	120	156	13	5	137	130	2	62	2	2	589	302	0				.341	.489	.661	1.150	153	79.1	.501	192	75.3
18	Matt Williams M. Williams	0.69	43	62	1994	SFG	112	445	74	119	16	3	96	33	2	87	1	0	483	270	0	3	7	11	.267	.319	.607	.926	81	19.7	.382	133	20.5
19	Ralph Kiner R. Kiner	0.69	54	78	1949	PIT	152	549	116	170	19	5	127	117	1	61	6		667	361	0			10	.310	.432	.658	1.089	153	73.4	.484	179	65.8
20	Ryan Howard R. Howard	0.69	58	84	2006	PHI	159	581	104	182	25	1	149	108	9	181	0	0	704	383	0	6	37	7	.313	.425	.659	1.084	151	63	.436	162	57.5
21	Harmon Killebrew H. Killebrew	0.69	49	71	1969	MIN	162	555	106	153	20	2	140	145	5	84	8	2	709	324	0	4	20	16	.276	.427	.584	1.011	143	67.4	.441	173	59.9
22	Aaron Judge A. Judge	0.69	62	90	2022	NYY	157	570	133	177	28	0	131	111	6	175	16	3	692	391	0	5	19	14	.311	.425	.686	1.111	161	81.6	.458	208	84.5
23	Harmon Killebrew H. Killebrew	0.69	48	70	1962	MIN	155	552	85	134	21	1	126	106	4	142	1	2	666	301	0	4	6	14	.243	.366	.545	.912	116	38.8	.395	138	31.6
24	Willie Mays W. Mays	0.68	52	76	1965	SFG	157	558	118	177	21	3	112	76	0	71	9	4	638	360	2	2	16	11	.317	.398	.645	1.043	136	68.2	.448	186	62.7
25	Adam Dunn A. Dunn	0.68	41	60	2012	CWS	151	539	87	110	19	0	96	105	1	222	2	1	649	252	0	4	3	8	.204	.333	.468	.800	90	16.2	.346	115	11.4