Rogers Hornsby had the best on-base percentage in 1925, with an on-base percentage of .489.

Interpreted as:

best obp with a minimum of 3.1 PA per team game by an MLB player 1925

	NAME	OBP	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	AVG	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Rogers Hornsby R. Hornsby	.489	1925	SLN	138	504	133	203	41	10	39	143	83	2	39	5	3	605	381	90	16	.403	.756	1.245	173	94.1	.540	208	90.1
2	Tristram Speaker T. Speaker	.479	1925	CLE	117	429	79	167	35	5	12	87	70	4	12	5	2	518	248	52	15	.389	.578	1.057	122	54.3	.479	167	49
3	Ty Cobb T. Cobb	.468	1925	DET	121	415	97	157	31	12	12	102	65	5	12	13	9	490	248	55	5	.378	.598	1.066	115	51.1	.478	166	46
4	Eddie Collins E. Collins	.461	1925	CWS	118	425	80	147	26	3	3	80	87	4	8	19	6	533	188	32	17	.346	.442	.904	103	32.9	.428	139	29.5
5	Harry Heilmann H. Heilmann	.457	1925	DET	150	573	97	225	40	11	13	134	67	1	27	6	6	664	326	64	23	.393	.569	1.026	148	61.4	.464	158	54.6
6	Al Wingo A. Wingo	.456	1925	DET	130	440	104	163	34	10	5	68	69	0	31	14	13	524	232	49	15	.370	.527	.983	111	42	.450	149	36.5
7	Jack Fournier J. Fournier	.446	1925	BKN	145	545	99	191	21	16	22	130	86	8	39	4	6	649	310	59	10	.350	.569	1.015	141	56	.457	160	53.4
8	Ray Blades R. Blades	.423	1925	SLN	122	462	112	158	37	8	12	57	59	6	47	6	8	532	247	57	5	.342	.535	.958	105	35.6	.434	144	32.1
9	Kiki Cuyler K. Cuyler	.423	1925	PIT	153	617	144	220	43	26	18	102	58	13	56	41	13	700	369	87	12	.357	.598	1.021	150	58.7	.454	154	52.2
10	Al Simmons A. Simmons	.419	1925	PHA	153	654	122	253	43	12	24	129	35	1	41	7	14	696	392	79	6	.387	.599	1.018	150	58.6	.455	150	49.6
11	Max Carey M. Carey	.418	1925	PIT	133	542	109	186	39	13	5	44	66	4	19	46	11	620	266	57	8	.343	.491	.909	114	32.6	.417	132	26.9
12	Jim Bottomley J. Bottomley	.413	1925	SLN	153	619	92	227	44	12	21	128	47	2	36	3	4	681	358	77	13	.367	.578	.992	140	51	.443	150	46.5
13	Earle Combs E. Combs	.411	1925	NYY	150	593	117	203	36	13	3	62	65	4	43	12	13	673	274	52	11	.342	.462	.873	116	27.8	.403	124	22.6
14	Muddy Ruel M. Ruel	.411	1925	WSH	127	393	55	122	9	2	0	54	63	4	16	4	5	473	135	11	13	.310	.344	.754	67	5.5	.368	105	3.1
15	Ike Boone I. Boone	.406	1925	BSA	133	476	79	157	34	5	9	68	60	1	19	1	4	545	228	48	8	.330	.479	.885	95	23.9	.406	123	17.6
16	Zack Wheat Z. Wheat	.403	1925	BKN	150	616	125	221	42	14	14	103	45	1	22	3	1	670	333	70	8	.359	.541	.944	128	39.8	.425	140	37.1
17	Lu Blue L. Blue	.403	1925	DET	150	532	92	163	18	9	3	94	83	3	29	19	5	652	208	30	34	.306	.391	.794	98	12.7	.377	106	6
18	Joe Sewell J. Sewell	.402	1925	CLE	155	608	78	204	37	7	1	98	64	4	4	7	6	699	258	45	23	.336	.424	.827	111	19.1	.387	112	11.8
19	Johnny Mostil J. Mostil	.400	1925	CWS	153	605	135	181	36	16	2	50	90	12	52	43	20	716	255	54	9	.299	.421	.822	113	18.8	.385	114	14.2
20	Dave Bancroft D. Bancroft	.400	1925	BSN	128	479	75	153	29	8	2	49	64	0	22	7	4	560	204	39	17	.319	.426	.826	88	14.8	.385	119	14.7
21	Dick Burrus D. Burrus	.396	1925	BSN	152	588	82	200	41	4	5	87	51	3	29	8	9	652	264	50	10	.340	.449	.845	105	20	.391	122	19.9
22	Goose Goslin G. Goslin	.394	1925	WSH	150	601	116	201	34	20	18	113	53	6	50	27	8	670	329	72	10	.334	.547	.941	126	37.8	.421	136	34.4
23	Jimmy Dykes J. Dykes	.393	1925	PHA	122	465	93	150	32	11	5	55	46	8	49	3	2	533	219	48	14	.323	.471	.864	89	18.9	.396	116	11.9
24	Baby Doll Jacobson B. Doll Jacobson	.392	1925	SLA	142	540	103	184	30	9	15	76	45	1	26	8	11	602	277	54	16	.341	.513	.905	107	28.1	.410	120	17.1
25	Willie Kamm W. Kamm	.391	1925	CWS	152	509	82	142	32	4	6	83	90	4	36	11	13	640	200	42	37	.279	.393	.784	94	9.7	.372	106	5.6