Sam Thompson launched the most homers in 1889, with 20 home runs.

Interpreted as:

most hr by a player 1880 – 1889

	NAME	HR	SEASON	TM	G	AB	R	H	2B	3B	RBI	BB	HBP	SO	SB	PA	TB	XBH	AVG	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Sam Thompson S. Thompson	20	1889	PHN	128	533	103	158	36	4	111	36	6	22	24	575	262	60	.296	.348	.492	.839	113	24.7	.386	118	17
2	Bug Holliday B. Holliday	19	1889	CIN	135	563	107	181	28	7	104	43	2	59	46	608	280	54	.321	.372	.497	.869	128	34.2	.402	132	30.4
3	Harry Stovey H. Stovey	19	1889	PHA	137	556	152	171	38	13	119	77	1	68	63	634	292	70	.308	.393	.525	.918	144	46.6	.423	144	43.7
4	Jerry Denny J. Denny	18	1889	IND	133	578	96	163	24	0	112	27	0	63	22	605	241	42	.282	.314	.417	.731	96	2.9	.340	93	-7.1
5	Jimmy Ryan J. Ryan	17	1889	CWS	135	576	140	187	31	14	72	70	6	62	45	652	297	62	.325	.403	.516	.919	150	50	.426	134	36.3
6	Charlie Duffee C. Duffee	16	1889	STL	137	509	93	124	15	11	86	60	3	81	21	572	209	42	.244	.327	.411	.738	94	5.9	.347	96	-3.7
7	Roger Connor R. Connor	13	1889	NYG	131	496	117	157	32	17	130	93	2	46	21	591	262	62	.317	.426	.528	.955	144	53.6	.443	150	48.4
8	Hugh Duffy H. Duffy	12	1889	CWS	136	584	144	182	21	7	89	46	2	30	52	632	253	40	.312	.364	.433	.797	119	22	.376	108	8.7
9	Jocko Milligan J. Milligan	12	1889	STL	72	273	53	100	30	2	76	16	3	19	2	292	170	44	.366	.408	.623	1.030	77	32	.466	158	27
10	Duke Farrell D. Farrell	11	1889	CWS	101	407	66	107	19	7	75	41	1	21	13	449	173	37	.263	.332	.425	.757	76	7.4	.354	97	-2
11	Mike Tiernan M. Tiernan	10	1889	NYG	122	499	147	167	23	14	73	96	5	32	33	600	248	47	.335	.447	.497	.944	148	56	.446	152	50.7
12	Jake Beckley J. Beckley	9	1889	PIT	123	522	91	157	24	10	97	29	6	29	11	557	228	43	.301	.345	.437	.781	100	14.5	.365	118	16.5
13	King Kelly K. Kelly	9	1889	BSN	125	507	120	149	41	5	78	65	2	40	68	574	227	55	.294	.376	.448	.824	114	26.2	.389	117	15.9
14	Denny Lyons D. Lyons	9	1889	PHA	131	510	135	168	36	4	82	79	7	44	10	596	239	49	.329	.426	.469	.895	137	45.6	.426	145	42.9
15	Tip O'Neill T. O'Neill	9	1889	STL	134	534	123	179	33	8	110	72	5	37	28	611	255	50	.335	.419	.478	.897	140	45.8	.424	137	35.4
16	George Van Haltren G. Van Haltren	9	1889	CWS	134	543	126	175	20	10	81	82	5	41	28	630	242	39	.322	.416	.446	.862	138	41	.412	127	27.7
17	Walt Wilmot W. Wilmot	9	1889	WSH	108	432	88	125	19	19	57	51	2	32	40	485	209	47	.289	.367	.484	.851	99	24	.394	128	22
18	Dick Buckley D. Buckley	8	1889	IND	68	260	35	67	11	0	41	15	1	32	5	276	102	19	.258	.301	.392	.693	40	-2.4	.324	85	-6.9
19	Pop Corkhill P. Corkhill	8	1889	BKN	138	537	91	134	21	9	78	42	3	24	22	582	197	38	.250	.308	.367	.674	83	-6.8	.320	94	-5.9
20	Emmett Seery E. Seery	8	1889	IND	127	526	123	165	26	12	59	67	10	59	19	603	239	46	.314	.401	.454	.856	129	36.2	.406	127	26.3
21	Patsy Tebeau P. Tebeau	8	1889	CLE	136	521	72	147	20	6	76	37	2	41	26	560	203	34	.282	.332	.390	.722	90	3.8	.342	98	-2
22	Joe Visner J. Visner	8	1889	BKN	80	295	56	76	12	10	68	36	4	36	13	335	132	30	.258	.346	.447	.794	61	10	.370	120	10.6
23	Cap Anson C. Anson	7	1889	CWS	134	518	100	177	32	7	117	86	5	19	27	609	244	46	.342	.440	.471	.911	145	51.1	.435	138	38.3
24	Lou Bierbauer L. Bierbauer	7	1889	PHA	130	549	80	167	27	7	105	29	4	30	17	582	229	41	.304	.344	.417	.761	101	11.7	.358	110	9
25	Dan Brouthers D. Brouthers	7	1889	BSN	126	485	105	181	26	9	118	66	14	6	22	565	246	42	.373	.462	.507	.969	146	59	.460	153	48.9