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

Interpreted as:

best obp with a minimum of 3.1 PA per team game by an al 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	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
4	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
5	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
6	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
7	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
8	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
9	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
10	Aaron Hicks A. Hicks	.366	2018	NYY	137	480	90	119	18	3	27	79	90	3	111	11	2	581	224	48	2	6	1	1	.248	.467	.833	89	21.4	.360	129	19.8
11	Mitch Haniger M. Haniger	.366	2018	SEA	157	596	90	170	38	4	26	93	70	10	148	8	2	683	294	68	0	7	4	8	.285	.493	.859	109	28.9	.367	137	30.3
12	Andrew Benintendi A. Benintendi	.366	2018	BOS	148	579	103	168	41	6	16	87	71	2	106	21	3	661	269	63	2	7	1	9	.290	.465	.830	100	23	.357	123	18.1
13	Michael Brantley M. Brantley	.364	2018	CLE	143	570	89	176	36	2	17	76	48	5	60	12	3	630	267	55	1	6	0	15	.309	.468	.832	96	22.7	.359	125	18.8
14	Matt Duffy M. Duffy	.361	2018	TBR	132	503	59	148	22	1	4	44	47	7	93	12	6	560	184	27	1	2	1	12	.294	.366	.727	69	3.9	.323	107	5
15	Xander Bogaerts X. Bogaerts	.360	2018	BOS	136	513	72	148	45	3	23	103	55	6	102	8	2	580	268	71	0	6	4	14	.288	.522	.883	95	27.5	.373	134	23.3
16	Matt Chapman M. Chapman	.356	2018	OAK	145	547	100	152	42	6	24	68	58	9	146	1	2	616	278	72	0	2	0	18	.278	.508	.864	99	27.4	.369	139	28.6
17	Nick Castellanos N. Castellanos	.354	2018	DET	157	620	88	185	46	5	23	89	49	6	151	2	1	678	310	74	0	3	5	8	.298	.500	.854	106	26.7	.363	129	23.3
18	Joey Wendle J. Wendle	.354	2018	TBR	139	487	62	146	33	6	7	61	37	9	96	16	4	545	212	46	2	10	4	11	.300	.435	.789	74	10.2	.338	117	11.3
19	Jed Lowrie J. Lowrie	.353	2018	OAK	157	596	78	159	37	1	23	99	78	3	128	0	0	680	267	61	0	3	1	8	.267	.448	.801	98	18.1	.347	124	19.5
20	Francisco Lindor F. Lindor	.352	2018	CLE	158	661	129	183	42	2	38	92	70	8	107	25	10	745	343	82	3	3	7	5	.277	.519	.871	120	32.6	.368	131	28
21	Joe Mauer J. Mauer	.351	2018	MIN	127	486	64	137	27	1	6	48	51	2	86	0	1	543	184	34	1	3	5	9	.282	.379	.729	65	1.8	.319	100	-0.3
22	Justin Smoak J. Smoak	.350	2018	TOR	147	505	67	122	34	0	25	77	83	3	156	0	1	594	231	59	0	3	2	11	.242	.457	.808	86	16.6	.349	120	14.3
23	George Springer G. Springer	.346	2018	HOU	140	544	102	144	26	0	22	71	64	5	122	6	4	616	236	48	0	3	0	12	.265	.434	.780	85	12.6	.340	119	13.8
24	Justin Upton J. Upton	.344	2018	LAA	145	533	80	137	18	1	30	85	64	10	176	8	2	613	247	49	0	6	1	12	.257	.463	.808	88	16.7	.348	121	15.7
25	Giancarlo Stanton G. Stanton	.343	2018	NYY	158	617	102	164	34	1	38	100	70	8	211	5	0	705	314	73	0	10	5	17	.266	.509	.852	108	25.9	.360	128	24