Mike Trout had the highest on-base percentage in 2018, with an on-base percentage of .460.

Interpreted as:

best obp with a minimum of 3.1 PA per team game by a player in 2018

	NAME	OBP	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Mike Trout M. Trout	.460	2018	LAA	140	471	101	147	24	4	39	79	122	10	124	24	2	607	296	67	0	4	25	5	.312	.628	1.088	136	65.3	.447	189	64.4
2	Mookie Betts M. Betts	.438	2018	BOS	136	520	129	180	47	5	32	80	81	8	91	30	6	614	333	84	0	5	8	5	.346	.640	1.078	139	67.2	.449	185	62.7
3	Joey Votto J. Votto	.417	2018	CIN	145	503	67	143	28	2	12	67	108	9	101	2	0	623	211	42	0	3	6	15	.284	.419	.837	101	28	.370	131	23.2
4	Brandon Nimmo B. Nimmo	.404	2018	NYM	140	433	77	114	28	8	17	47	80	22	140	9	6	535	209	53	0	0	2	8	.263	.483	.886	93	30.8	.385	148	31.1
5	Christian Yelich C. Yelich	.402	2018	MIL	147	574	118	187	34	7	36	110	68	7	135	22	4	651	343	77	0	2	2	14	.326	.598	1.000	133	57	.422	167	53.6
6	J.D. Martinez	.402	2018	BOS	150	569	111	188	37	2	43	130	69	4	146	6	1	649	358	82	0	7	11	19	.330	.629	1.031	136	59.7	.427	171	54.9
7	Lorenzo Cain L. Cain	.395	2018	MIL	141	539	90	166	25	2	10	38	71	8	94	30	7	620	225	37	0	2	1	10	.308	.417	.813	95	22.3	.359	125	19.1
8	Alex Bregman A. Bregman	.394	2018	HOU	157	594	105	170	51	1	31	103	96	12	85	10	4	705	316	83	0	3	2	15	.286	.532	.926	129	46.5	.396	157	47.9
9	Bryce Harper B. Harper	.393	2018	WSH	159	550	103	137	34	0	34	100	130	6	169	13	3	695	273	68	0	9	16	7	.249	.496	.889	116	34.6	.376	135	29.3
10	Paul Goldschmidt P. Goldschmidt	.389	2018	ARI	158	593	95	172	35	5	33	83	90	6	173	7	4	689	316	73	0	0	11	7	.290	.533	.922	123	42.3	.390	145	37.9
11	Freddie Freeman F. Freeman	.388	2018	ATL	162	618	94	191	44	4	23	98	76	7	132	10	3	707	312	71	0	6	12	11	.309	.505	.892	119	36.4	.378	136	31.1
12	José Ramírez J. Ramírez	.387	2018	CLE	157	578	110	156	38	4	39	105	106	8	80	34	6	698	319	81	0	6	15	2	.270	.552	.939	125	43.7	.391	147	39.4
13	Jose Altuve J. Altuve	.386	2018	HOU	137	534	84	169	29	2	13	61	55	6	79	17	4	599	241	44	3	1	4	17	.316	.451	.837	94	23.8	.363	135	25
14	Ben Zobrist B. Zobrist	.378	2018	CHC	139	455	67	139	28	3	9	58	55	2	60	3	4	520	200	40	1	7	1	8	.305	.440	.817	78	16.9	.355	123	14.8
15	Shin-Soo Choo S. Choo	.377	2018	TEX	146	560	83	148	30	1	21	62	92	10	156	6	1	665	243	52	1	2	2	11	.264	.434	.810	100	22.1	.355	117	13.3
16	Anthony Rizzo A. Rizzo	.376	2018	CHC	153	566	74	160	29	1	25	101	70	20	80	6	4	665	266	55	0	9	15	11	.283	.470	.846	102	23.9	.359	126	21.2
17	Matt Carpenter M. Carpenter	.374	2018	STL	156	564	111	145	42	0	36	81	102	6	158	4	1	676	295	78	0	4	17	0	.257	.523	.897	112	33.5	.375	140	33.1
18	Anthony Rendon A. Rendon	.374	2018	WSH	136	529	88	163	44	2	24	92	55	5	82	2	1	597	283	70	0	8	5	5	.308	.535	.909	103	33.2	.383	139	28.7
19	Nolan Arenado N. Arenado	.374	2018	COL	156	590	104	175	38	2	38	110	73	3	122	2	2	673	331	78	1	6	10	16	.297	.561	.935	120	41.7	.391	133	27.2
20	Andrew McCutchen A. McCutchen	.368	2018	TOT	155	569	83	145	30	3	20	65	95	11	145	14	9	682	241	53	0	7	1	12	.255	.424	.792	98	18.1	.347	120	16.8
21	Whit Merrifield W. Merrifield	.367	2018	KCR	158	632	88	192	43	3	12	60	61	6	114	45	10	707	277	58	2	6	2	12	.304	.438	.806	103	20	.349	119	16.4
22	Mallex Smith M. Smith	.367	2018	TBR	141	480	65	142	27	10	2	40	47	8	98	40	12	544	195	39	7	2	0	11	.296	.406	.773	75	11	.339	119	12.1
23	Manny Machado M. Machado	.367	2018	TOT	162	632	84	188	35	3	37	107	70	2	104	14	2	709	340	75	0	5	18	26	.297	.538	.905	119	35.9	.377	141	34.9
24	Tommy Pham T. Pham	.367	2018	TOT	137	494	102	136	18	6	21	63	67	6	140	15	7	570	229	45	0	3	2	18	.275	.464	.830	87	20.5	.359	130	20.6
25	Eugenio Suárez E. Suárez	.366	2018	CIN	143	527	79	149	22	2	34	104	64	9	142	1	1	606	277	58	0	6	7	20	.283	.526	.892	101	30.5	.376	135	25.9