Stan Hack has the highest on-base percentage in a game with 10+ plate appearances, with an on-base percentage of 1.000 against the Reds on August 9, 1942.

Interpreted as:

highest obp by a player in a regular-season game with 10 or more pa

	NAME	OBP	PA	DATE	TM		OPP	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	TB	XBH	SH	SF	IBB	GIDP
1	Stan Hack S. Hack	1.000	10	8/9/1942	CHC	@	CIN	5	3	5	1	0	0	1	4	0	0	0	0	6	1	1			0
2	Johnny Burnett J. Burnett	.818	11	7/10/1932	CLE	vs	PHA	11	4	9	2	0	0	2	0	0	1	0	0	11	2	0
3	Melky Cabrera M. Cabrera	.800	10	8/10/2014	TOR	vs	DET	5	0	3	0	0	0	1	5	0	0	0	0	3	0	0	0	2	0
4	Rod Carew R. Carew	.800	10	5/12/1972	MIN	vs	MIL	7	0	5	2	0	0	2	3	0	0	0	0	7	2	0	0	2	0
5	Lou Gehrig L. Gehrig	.800	10	9/5/1927	NYY	@	BSA	6	1	4	0	0	1	4	4	0	0	1	0	7	1	0
6	Rocky Colavito R. Colavito	.727	11	6/24/1962	DET	vs	NYY	10	1	7	0	1	0	1	1	0	0	0	0	9	1	0	0	0	0
7	Jimmie Foxx J. Foxx	.700	10	7/10/1932	PHA	@	CLE	9	4	6	1	0	3	8	1	0	0	0	0	16	4	0
8	Max Flack M. Flack	.700	10	7/17/1918	CHC	vs	PHN	8	1	5	0	0	0	1	2	0	0	1		5	0	0
9	Steve Brye S. Brye	.667	10	5/12/1972	MIN	vs	MIL	6	0	3	0	0	0	0	3	0	2	0	0	3	0	1	0	0	0
10	Phil Cavarretta P. Cavarretta	.667	10	8/9/1942	CHC	@	CIN	5	2	2	0	0	0	2	4	0	0	0	0	2	0	1			0
11	Earl Averill E. Averill	.636	11	7/10/1932	CLE	vs	PHA	9	3	5	0	0	1	4	2	0	1	0	0	8	1	0
12	Eddie Miller E. Miller	.625	10	6/27/1939	BSN	vs	BKN	7	0	4	0	0	0	1	1	0	1	0	0	4	0	2			0
13	Tony Campana T. Campana	.600	10	8/24/2013	ARI	@	PHI	5	1	1	0	0	0	0	5	0	1	0	0	1	0	0	0	0	0
14	Paul Goldschmidt P. Goldschmidt	.600	10	8/24/2013	ARI	@	PHI	6	2	2	1	0	0	1	4	0	0	0	0	3	1	0	0	2	0
15	Gerardo Parra G. Parra	.600	10	8/24/2013	ARI	@	PHI	9	0	5	1	0	0	3	1	0	2	0	0	6	1	0	0	0	0
16	Cliff Pennington C. Pennington	.600	10	8/24/2013	ARI	@	PHI	5	1	1	0	0	0	0	5	0	0	0	0	1	0	0	0	1	1
17	Jose Offerman J. Offerman	.600	10	7/7/1993	LAD	@	PHI	8	2	4	1	0	0	0	2	0	0	0	0	5	1	0	0	0	0
18	Tim Raines T. Raines	.600	10	5/1/1991	CWS	@	MIL	7	2	3	0	0	1	2	3	0	0	1	0	6	1	0	0	0	0
19	Gary Carter G. Carter	.600	10	7/4/1985	NYM	@	ATL	9	1	5	0	0	0	2	1	0	1	0	0	5	0	0	0	0	1
20	Tom Paciorek T. Paciorek	.600	10	5/8/1984	CWS	vs	MIL	9	1	5	0	0	0	3	1	0	3	0	0	5	0	0	0	1	0
21	Jerry Remy J. Remy	.600	10	9/3/1981	BOS	vs	SEA	10	2	6	0	0	0	0	0	0	1	0	0	6	0	0	0	0	0
22	Toby Harrah T. Harrah	.600	10	9/14/1971	WSH	@	CLE	7	1	3	0	0	0	0	3	0	0	2	0	3	0	0	0	0	0
23	Rich Reese R. Reese	.600	10	7/19/1969	MIN	@	SEA	8	0	4	1	0	0	0	2	0	1	0	0	5	1	0	0	1	0
24	Ted Uhlaender T. Uhlaender	.600	10	7/19/1969	MIN	@	SEA	7	2	4	0	0	1	5	2	0	0	0	1	7	1	0	1	0	0
25	Eddie Waitkus E. Waitkus	.600	10	9/15/1950	PHN	vs	CIN	9	2	5	2	0	0	0	1	0	1	0	0	7	2	0		0	0