The Boston Red Sox have the most bases on balls by a team in a season, with 835 bases on balls in 1949.

	TEAM	BB	SEASON	G	W%	W	L	AB	R	H	2B	3B	HR	RBI	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Red Sox	835	1949	155	.623	96	58	5,320	896	1,500	272	36	131	835	17	510	43	25	6,250	2,237	439	78			169	.282	.381	.420	.802
2	Red Sox	821	1948	155	.619	96	59	5,363	907	1,471	277	40	121	854	32	549	38	17	6,282	2,191	438	66			144	.274	.374	.409	.782
3	Athletics	783	1949	154	.526	81	73	5,123	726	1,331	214	49	82	680	25	493	36	25	6,048	1,889	345	117			160	.260	.361	.369	.729
4	Mariners	775	2000	162	.562	91	71	5,497	907	1,481	300	26	198	869	48	1,073	122	56	6,444	2,427	524	63	61	34	129	.269	.361	.442	.803
5	Browns	775	1941	157	.455	70	84	5,408	765	1,440	281	58	91	729	13	552	50	39	6,285	2,110	430	89			118	.266	.360	.390	.750
6	Athletics	770	1999	162	.537	87	75	5,519	893	1,430	287	20	235	845	71	1,129	70	37	6,440	2,462	542	39	41	32	129	.259	.355	.446	.801
7	Tigers	765	1993	162	.525	85	77	5,620	899	1,546	282	38	178	853	35	1,122	104	63	6,505	2,438	498	33	52	50	101	.275	.362	.434	.796
8	Yankees	765	1932	156	.695	107	47	5,476	1,002	1,564	279	82	160	954	27	526	77	66	6,344	2,487	521	76				.286	.376	.454	.830
9	Tigers	761	1947	158	.552	85	69	5,276	714	1,363	234	42	103	662	13	563	52	60	6,147	1,990	379	97			130	.258	.353	.377	.730
10	Red Sox	756	1951	154	.565	87	67	5,378	804	1,428	233	32	127	757	18	594	20	21	6,211	2,106	392	59			169	.266	.358	.392	.750
11	Athletics	750	2000	161	.565	91	70	5,560	947	1,501	281	23	239	908	52	1,159	40	15	6,432	2,545	543	26	44	32	147	.270	.360	.458	.817
12	Yankees	750	1931	155	.614	94	59	5,608	1,067	1,667	276	78	155	990	28	554	139	68	6,473	2,564	509	87				.297	.383	.457	.840
13	Yankees	749	1938	157	.651	99	53	5,410	966	1,480	283	63	174	918	39	617	91	28	6,259	2,411	520	61				.274	.366	.446	.812
14	Tigers	748	1949	155	.565	87	67	5,259	751	1,405	215	51	88	707	23	501	39	52	6,137	1,986	354	107			164	.267	.361	.378	.739
15	Indians	743	1999	162	.599	97	65	5,634	1,009	1,629	309	32	209	960	55	1,099	147	50	6,553	2,629	550	54	67	41	136	.289	.373	.467	.840
16	Dodgers	732	1947	155	.610	94	60	5,249	774	1,428	241	50	83	719	29	561	88		6,125	2,018	374	115			87	.272	.364	.384	.749
17	Giants	729	1970	162	.531	86	76	5,578	831	1,460	257	35	165	773	56	1,005	83	27	6,469	2,282	457	66	40	95	144	.262	.351	.409	.760
18	Yankees	729	1949	155	.630	97	57	5,196	829	1,396	215	60	115	760	32	539	58	30	6,041	2,076	390	84			141	.269	.362	.400	.762
19	Astros	728	1999	162	.599	97	65	5,485	823	1,463	293	23	168	784	52	1,138	166	75	6,402	2,306	484	79	58	57	127	.267	.355	.420	.775
20	Red Sox	727	1956	155	.545	84	70	5,349	780	1,473	261	45	139	752	25	689	28	19	6,215	2,241	445	68	46	41	153	.275	.362	.419	.781
21	Athletics	725	1948	154	.545	84	70	5,181	729	1,345	231	47	68	684	22	523	40	32	6,048	1,874	346	120			137	.260	.353	.362	.715
22	Indians	723	1955	154	.604	93	61	5,146	698	1,325	195	31	148	657	35	715	28	24	6,050	2,026	374	87	59	36	112	.257	.349	.394	.743
23	Tigers	722	1950	157	.617	95	59	5,381	837	1,518	285	50	114	788	19	481	23	40	6,232	2,245	449	110			162	.282	.369	.417	.786
24	Red Sox	719	1950	154	.610	94	60	5,516	1,027	1,665	287	61	161	974	25	580	32	17	6,322	2,557	509	62			153	.302	.385	.464	.848
25	Yankees	718	1999	162	.605	98	64	5,568	900	1,568	302	36	193	855	55	978	104	57	6,416	2,521	531	22	53	47	137	.282	.366	.453	.819