Vladimir Guerrero Jr. had the highest on-base percentage in the AL in 2021, with an on-base percentage of .401.

Interpreted as:

2021 al highest obp with a minimum of 3.1 PA per team game by player

	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	Vladimir Guerrero Jr. V. Guerrero Jr.	.401	2021	TOR	161	604	123	188	29	1	48	111	86	6	110	4	1	698	363	78	0	2	7	20	.311	.601	1.002	145	60.4	.419	166	56.1
2	Yuli Gurriel Y. Gurriel	.383	2021	HOU	143	530	83	169	31	0	15	81	59	4	68	1	1	605	245	46	0	12	2	16	.319	.462	.846	98	24.4	.363	133	24.3
3	Yoán Moncada Y. Moncada	.375	2021	CWS	144	520	74	137	33	1	14	61	84	10	157	3	2	616	214	48	0	2	1	6	.263	.412	.787	91	16.7	.347	120	15.1
4	Aaron Judge A. Judge	.373	2021	NYY	148	550	89	158	24	0	39	98	75	3	158	6	1	633	299	63	0	5	2	16	.287	.544	.916	115	38	.387	150	38.7
5	Shohei Ohtani S. Ohtani	.372	2021	LAA	155	537	103	138	26	8	46	100	96	4	189	26	10	639	318	80	0	2	20	7	.257	.592	.965	119	41.8	.393	150	39.4
6	Matt Olson M. Olson	.371	2021	OAK	156	565	101	153	35	0	39	111	88	9	113	4	1	673	305	74	0	11	12	17	.271	.540	.911	117	35.7	.379	147	38.9
7	Xander Bogaerts X. Bogaerts	.370	2021	BOS	144	529	90	156	34	1	23	79	62	5	113	5	1	603	261	58	0	7	2	13	.295	.493	.863	100	26.7	.368	129	21.5
8	Ty France T. France	.368	2021	SEA	152	571	85	166	32	1	18	73	46	27	106	0	0	650	254	51	0	6	1	13	.291	.445	.813	99	20.8	.353	129	23
9	Carlos Correa C. Correa	.366	2021	HOU	148	555	104	155	34	1	26	92	75	4	116	0	0	640	269	61	0	6	2	16	.279	.485	.850	104	26	.364	133	25.9
10	Nicky Lopez N. Lopez	.365	2021	KCR	151	497	78	149	21	6	2	43	49	4	74	22	1	565	188	29	12	3	0	9	.300	.378	.744	75	6.7	.329	105	3.1
11	Michael Brantley M. Brantley	.362	2021	HOU	121	469	68	146	29	3	8	47	33	5	53	1	0	508	205	40	0	1	1	11	.311	.437	.799	75	13.5	.347	122	13.4
12	Cedric Mullins C. Mullins	.360	2021	BAL	159	602	91	175	37	5	30	59	59	8	125	30	8	674	312	72	1	4	3	2	.291	.518	.878	114	31.9	.372	136	29.4
13	Kyle Tucker K. Tucker	.359	2021	HOU	140	506	83	149	37	3	30	92	53	1	90	14	2	565	282	70	0	5	5	10	.294	.557	.917	100	31.8	.383	146	31.7
14	Mark Canha M. Canha	.358	2021	OAK	141	519	93	120	22	4	17	61	77	27	128	12	2	625	201	43	0	2	0	9	.231	.387	.746	85	9.6	.333	116	12.5
15	Robbie Grossman R. Grossman	.357	2021	DET	156	557	88	133	23	3	23	67	98	8	155	20	5	671	231	49	2	6	3	8	.239	.415	.772	94	12.8	.337	114	11.9
16	Nathaniel Lowe N. Lowe	.357	2021	TEX	157	557	75	147	24	3	18	72	80	2	162	8	0	642	231	45	0	3	2	13	.264	.415	.771	90	12	.337	112	9.6
17	Randy Arozarena R. Arozarena	.356	2021	TBR	141	529	94	145	32	3	20	69	56	14	170	20	10	604	243	55	0	5	4	9	.274	.459	.815	91	17.6	.350	128	20.4
18	José Ramírez J. Ramírez	.355	2021	CLE	152	552	111	147	32	5	36	103	72	7	87	27	4	636	297	73	0	5	10	13	.266	.538	.893	107	30.2	.372	140	30.9
19	Giancarlo Stanton G. Stanton	.354	2021	NYY	139	510	64	139	19	0	35	97	63	3	157	0	0	579	263	54	0	3	1	22	.273	.516	.870	97	26.4	.370	138	27
20	Yandy Díaz Y. Díaz	.353	2021	TBR	134	465	62	119	20	1	13	64	69	3	85	1	1	541	180	34	0	4	4	11	.256	.387	.740	70	4.6	.325	111	7.1
21	Rafael Devers R. Devers	.352	2021	BOS	156	591	101	165	37	1	38	113	62	7	143	5	5	664	318	76	0	4	7	13	.279	.538	.890	113	32.2	.373	133	26.5
22	Josh Donaldson J. Donaldson	.352	2021	MIN	135	457	73	113	26	0	26	72	74	4	114	0	0	543	217	52	0	8	2	22	.247	.475	.827	83	17.2	.353	126	17.1
23	Jeimer Candelario J. Candelario	.351	2021	DET	149	557	75	151	42	3	16	67	65	4	135	0	0	626	247	61	0	0	1	10	.271	.443	.795	91	15.5	.344	119	14.6
24	Alex Verdugo A. Verdugo	.351	2021	BOS	146	544	88	157	32	2	13	63	51	4	96	6	2	604	232	47	0	5	6	11	.289	.426	.777	83	9.7	.334	106	4.5
25	Joey Gallo J. Gallo	.351	2021	TOT	153	498	90	99	13	1	38	77	111	6	213	6	0	616	228	52	0	1	5	6	.199	.458	.808	92	17.4	.348	121	16.2