The Cleveland Indians have the highest on-base percentage by a team in a game, with an on-base percentage of .672 against the Red Sox on July 7, 1923.

Interpreted as:

highest obp as a team in one regular-season game

	TEAM	OBP	DATE	TM		OPP	RESULT	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	SLG	OPS
1	Indians	.672	7/7/1923	CLE	vs	BSA	W 27-3	43	27	24	5	2	0	25	14	1	1	4	2	61	33	7	3				.558	.767	1.440
2	Hoosiers	.667	8/16/1914	IND	vs	PTF	W 21-6	40	21	24	4	2	0	17	8	0	0	13		51	32	6	3				.600	.800	1.467
3	Pirates	.667	4/27/1912	PIT	vs	CIN	W 23-4	43	23	27	5	3	0	20	5	0	1	8		51	38	8	3				.628	.884	1.550
4	Athletics	.660	5/18/1912	PHA	vs	DET	W 24-2	43	24	26	4	6	0	22	7	0	1	10		52	42	10	2				.605	.977	1.637
5	Naps	.651	7/1/1905	CLE	vs	DET	W 14-3	39	14	24	3	3	0		3	1	1	2		44	33	6	1				.615	.846	1.497
6	Cardinals	.648	8/22/2008	STL	vs	ATL	W 18-3	44	18	26	5	0	0	18	9	0	6	0	2	55	31	5	1	1	2	1	.591	.705	1.353
7	Senators	.643	8/24/1923	WSH	@	CLE	W 20-8	42	20	22	6	3	0	18	14	0	0	3	2	59	34	9	3				.524	.810	1.452
8	Athletics	.635	5/21/1932	PHA	vs	BSA	W 18-6	36	18	17	5	1	2	18	15	1	1	0	0	54	30	8	2				.472	.833	1.468
9	Red Sox	.632	6/27/2003	BOS	vs	FLA	W 25-8	46	25	28	8	1	3	25	7	1	7	0	0	57	47	12	0	3	0	1	.609	1.022	1.653
10	Cubs	.632	8/25/1922	CHC	vs	PHN	W 26-23	46	26	25	8	0	3	24	10	1	4	1	0	59	42	11	2				.543	.913	1.545
11	Reds	.632	6/4/1911	CIN	vs	BSN	W 26-3	44	26	23	4	3	1		11	2	3	6		57	36	8	0				.523	.818	1.450
12	Indians	.630	8/7/1923	CLE	@	WSH	W 22-2	46	22	26	3	4	0	19	8	0	2	0	1	56	37	7	2				.565	.804	1.434
13	Twins	.623	4/24/1990	MIN	vs	DET	W 16-4	37	16	19	7	0	2	15	12	2	2	0	0	53	32	9	0	2	1	2	.514	.865	1.488
14	Robins	.619	6/10/1922	BKN	vs	CHC	W 13-0	40	13	24	2	2	0	13	1	1	0	1	0	46	30	4	4				.600	.750	1.369
15	Yankees	.619	7/7/1915	NYY	vs	PHA	W 13-5	28	13	12	3	1	0		14	0	2	3		46	17	4	4				.429	.607	1.226
16	White Sox	.617	8/11/1996	CWS	vs	BAL	W 8-5	36	8	19	3	0	0	8	9	1	2	3	1	49	22	3	2	1	1	2	.528	.611	1.228
17	Tigers	.617	9/15/1901	DET	vs	CLE	W 21-0	42	21	24	8	0	1	20	3	2	1	1	-10	49	35	9	2		-10	-10	.571	.833	1.450
18	Red Sox	.617	6/24/1949	BSA	vs	SLA	W 21-2	48	21	25	3	0	2	20	12	0	4	2	0	60	34	5	0			1	.521	.708	1.325
19	Robins	.615	9/6/1930	BKN	vs	PHN	W 22-8	44	22	24	1	3	3	22	8	0	1	0	0	52	40	7	0				.545	.909	1.524
20	Giants	.615	8/5/1922	NYG	vs	CHC	W 19-7	47	19	27	6	4	0	17	4	1	2	1	2	53	41	10	1				.574	.872	1.488
21	White Sox	.615	6/16/1916	CWS	vs	BSA	W 7-4	29	7	14	5	1	0	5	8	2	2	1		44	21	6	5				.483	.724	1.340
22	White Sox	.614	8/31/1922	CWS	@	DET	W 10-1	38	10	21	3	0	1	10	6	0	0	1	1	49	27	4	5				.553	.711	1.324
23	Naps	.614	9/27/1912	CLE	vs	DET	W 16-5	38	16	21	5	2	1	14	5	1	2	2		46	33	8	2				.553	.868	1.482
24	Tigers	.613	6/30/1912	DET	vs	CWS	W 11-9	29	11	17	2	0	2	10	2	0	1	0		36	25	4	5				.586	.862	1.475
25	Yankees	.612	9/6/1945	NYY	vs	DET	W 14-5	32	14	13	1	0	4	14	15	2	3	1	1	52	26	5	3			0	.406	.813	1.425