player with highest hr average in mlb history

21 players homered once in their careers. The first three are Esteban Yan, Frank O'Connor and Zack Britton.

	NAME	HR	AVG	G	AB	R	H	2B	3B	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Esteban Yan E. Yan	1	1.000	38	2	1	2	0	0	1	0	0	0	0	0	3	5	1	1	0	0	0	1.000	2.500	3.500	4	3.3	1.419	906	3.3
2	Frank O'Connor F. O'Connor	1	1.000	3	2	1	2	0	0	3	0	0	0	0		2	5	1					1.000	2.500	3.500	2	1.9	1.453	671	1.9
3	Zack Britton Z. Britton	1	.625	22	8	3	5	1	0	2	0	0	1	0	0	8	9	2	0	0	0	0	.625	1.125	1.750	4	2.8	.753	391	2.7
4	Carlos Rivero C. Rivero	1	.571	4	7	1	4	2	0	3	1	0	0	0	0	8	9	3	0	0	0	0	.625	1.286	1.911	4	2.9	.785	424	2.9
5	Humberto Castellanos H. Castellanos	1	.500	11	6	1	3	0	0	5	0	0	1	0	0	7	6	1	0	1	0	0	.429	1.000	1.429	2	1.3	.538	240	1.2
6	Mark Worrell M. Worrell	1	.500	4	2	1	1	0	0	3	0	0	0	0	0	2	4	1	0	0	0	0	.500	2.000	2.500	1	1.1	1.012	548	1.1
7	Don Durham D. Durham	2	.500	15	14	3	7	0	0	4	0	0	4	0	0	14	13	2	0	0	0	0	.500	.929	1.429	5	3.5	.651	314	3.3
8	Hal Haydel H. Haydel	1	.500	35	6	2	3	1	0	1	0	0	2	0	0	6	7	2	0	0	0	0	.500	1.167	1.667	3	1.9	.722	359	1.8
9	Ray Rippelmeyer R. Rippelmeyer	1	.500	18	6	2	3	1	0	1	0	0	1	0	0	6	7	2	0	0	0	0	.500	1.167	1.667	3	1.9	.714	342	1.8
10	Cliff Dapper C. Dapper	1	.471	8	17	2	8	1	0	9	2	0	2	0		19	12	2	0			0	.526	.706	1.232	5	3.3	.568	255	3.2
11	Buz Phillips B. Phillips	1	.462	14	13	3	6	1	0	2	0	0	2	0		13	10	2	0				.462	.769	1.231	4	2	.529	180	1.6
12	Charlton Jimerson C. Jimerson	2	.444	31	9	8	4	0	0	2	0	0	3	4	0	9	10	2	0	0	0	1	.444	1.111	1.556	3	2.3	.639	303	2.3
13	Hack Miller H. Miller	1	.444	7	9	1	4	0	0	4	1	0	1	0		11	7	1	1			1	.500	.778	1.278	3	2.1	.583	266	2
14	Chad Santos C. Santos	1	.429	3	7	2	3	0	0	2	1	0	2	0	0	8	6	1	0	0	0	0	.500	.857	1.357	3	1.5	.557	242	1.5
15	Domingo Martinez D. Martinez	2	.409	15	22	4	9	0	0	6	1	0	8	0	0	23	15	2	0	0	0	0	.435	.682	1.117	6	3	.492	208	2.8
16	Slade Heathcott S. Heathcott	2	.400	17	25	6	10	2	0	8	2	0	5	0	1	28	18	4	0	1	0	0	.429	.720	1.149	7	3.6	.475	208	3.5
17	Rick Short R. Short	2	.400	11	15	4	6	2	0	4	1	1	1	0	0	17	14	4	0	0	0	0	.471	.933	1.404	6	3.5	.574	263	3.5
18	Gene Stechschulte G. Stechschulte	1	.400	93	5	1	2	0	0	3	1	0	3	0	0	6	5	1	0	0	0	0	.500	1.000	1.500	2	1.4	.596	270	1.4
19	Mahlon Higbee M. Higbee	1	.400	3	10	2	4	0	0	5	0	0	2	0	0	11	7	1	1				.400	.700	1.100	3	1.3	.489	180	1.2
20	Pat Patterson P. Patterson	1	.400	23	35	5	14	0	0	5	2	0	5	0	1	37	17	1	0				.432	.486	.918	7	2.3	.425	148	2.3
21	Mike Ulisney M. Ulisney	1	.389	11	18	4	7	1	0	4	1	0	0	0		19	11	2	0			0	.421	.611	1.032	4	2.1	.480	181	1.9
22	Kevin Rhomberg K. Rhomberg	1	.383	41	47	5	18	0	0	3	4	0	11	1	3	52	21	1	0	1	0	0	.423	.447	.870	9	2.9	.391	142	2.6
23	Ty Cobb T. Cobb	117	.366	3,034	11,434	2,244	4,189	724	295	1,933	1,249	94	681	897		13,068	5,854	1,136	291				.433	.512	.945	2534	1,093.6	.445	165	975.1
24	Gene Martin G. Martin	1	.364	9	11	1	4	1	0	1	0	0	1	0	0	11	8	2	0	0	0	1	.364	.727	1.091	3	1.6	.500	240	1.5
25	Rogers Hornsby R. Hornsby	301	.358	2,259	8,173	1,579	2,930	541	169	1,584	1,038	48	679	135		9,475	4,712	1,011	216				.434	.577	1.010	2018	899	.459	173	863.2