Freddie Freeman had the best on-base percentage by a first baseman in 2020, with an on-base percentage of .462.

Interpreted as:

top 10 obp with a minimum of 3.1 PA per team game for 1st baseman 2020

	NAME	OBP	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SF	IBB	GIDP	AVG	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Freddie Freeman F. Freeman	.462	2020	ATL	60	214	51	73	23	1	13	53	45	3	37	2	0	262	137	37	0	7	6	.341	.640	1.102	63	30.1	.456	186	28.8
2	Paul Goldschmidt P. Goldschmidt	.417	2020	STL	58	191	31	58	13	0	6	21	37	1	43	1	0	230	89	19	1	0	4	.304	.466	.883	42	13	.387	146	13.6
3	Dominic Smith D. Smith	.377	2020	NYM	50	177	27	56	21	1	10	42	14	5	45	0	0	199	109	32	3	0	2	.316	.616	.993	40	15.5	.412	166	16.7
4	José Abreu J. Abreu	.370	2020	CWS	60	240	43	76	15	0	19	60	18	3	59	0	0	262	148	34	1	1	10	.317	.617	.987	53	20.2	.411	163	20.5
5	Jeimer Candelario J. Candelario	.369	2020	DET	52	185	30	55	11	3	7	29	20	1	49	1	1	206	93	21	0	0	3	.297	.503	.872	35	9.3	.373	139	10
6	Joey Votto J. Votto	.354	2020	CIN	54	186	32	42	8	0	11	22	37	0	43	0	0	223	83	19	0	1	5	.226	.446	.800	33	5.2	.347	111	3
7	Jesus Aguilar J. Aguilar	.352	2020	MIA	51	188	31	52	10	0	8	34	23	1	40	0	1	216	86	18	4	0	5	.277	.457	.809	32	5	.347	119	5.3
8	Carlos Santana C. Santana	.349	2020	CLE	60	206	34	41	7	0	8	30	47	1	43	0	0	255	72	15	1	1	5	.199	.350	.699	31	-0.8	.316	99	-0.2
9	Hunter Dozier H. Dozier	.344	2020	KCR	44	158	29	36	4	2	6	12	27	1	48	4	0	186	62	12	0	0	3	.228	.392	.736	24	1.1	.326	103	0.8
10	Anthony Rizzo A. Rizzo	.342	2020	CHC	58	203	26	45	6	0	11	24	28	10	38	3	1	243	84	17	2	4	6	.222	.414	.755	32	1.3	.326	103	1.1
11	Luke Voit L. Voit	.338	2020	NYY	56	213	41	59	5	0	22	52	17	3	54	0	0	234	130	27	1	0	4	.277	.610	.948	44	14.5	.393	153	15.3
12	Christian Walker C. Walker	.333	2020	ARI	57	218	35	59	18	1	7	34	19	3	50	1	1	243	100	26	3	0	6	.271	.459	.792	34	3.9	.339	110	3
13	Max Muncy M. Muncy	.331	2020	LAD	58	203	36	39	4	0	12	27	39	4	60	1	0	248	79	16	2	2	3	.192	.389	.720	30	-0.8	.316	98	-0.7
14	Vladimir Guerrero Jr. V. Guerrero Jr.	.329	2020	TOR	60	221	34	58	13	2	9	33	20	2	38	1	0	243	102	24	0	1	6	.262	.462	.791	34	3.7	.338	110	3
15	Pete Alonso P. Alonso	.326	2020	NYM	57	208	31	48	6	0	16	35	24	6	61	1	0	239	102	22	1	4	4	.231	.490	.817	35	4.5	.342	120	6
16	Renato Nunez R. Nunez	.324	2020	BAL	52	195	29	50	10	0	12	31	17	3	64	0	0	216	96	22	1	0	4	.256	.492	.816	32	4.9	.347	118	4.9
17	Matt Olson M. Olson	.310	2020	OAK	60	210	28	41	4	1	14	42	34	1	77	1	0	245	89	19	0	2	2	.195	.424	.734	30	-0.8	.316	104	1.3
18	Asdrubal Cabrera A. Cabrera	.305	2020	WSH	52	190	23	46	9	3	8	31	19	0	40	0	0	213	85	20	4	0	6	.242	.447	.753	27	-0.2	.319	96	-1
19	Josh Bell J. Bell	.305	2020	PIT	57	195	22	44	3	0	8	22	22	2	59	0	0	223	71	11	4	4	3	.226	.364	.669	22	-6.3	.286	76	-6.8
20	Miguel Sanó M. Sanó	.278	2020	MIN	53	186	31	38	12	0	13	25	18	1	90	0	0	205	89	25	0	1	3	.204	.478	.757	25	-0.5	.317	101	0.2
21	Yuli Gurriel Y. Gurriel	.274	2020	HOU	57	211	27	49	12	1	6	22	12	2	27	0	1	230	81	19	5	0	6	.232	.384	.658	21	-7.5	.281	76	-6.7
22	Evan White E. White	.252	2020	SEA	54	182	19	32	7	0	8	26	18	1	84	1	2	202	63	15	1	0	3	.176	.346	.599	15	-9.9	.261	67	-8.2