Stan Hack and Max Carey are tied for the highest on-base percentage in a game with 9+ plate appearances, with an on-base percentage of 1.000.

Interpreted as:

highest obp by a player in a regular-season game with 9 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	Max Carey M. Carey	1.000	9	7/7/1922	PIT	vs	NYG	6	3	6	1	0	0	2	3	0	0	3	0	7	1	0
3	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
4	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
5	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
6	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
7	Chipper Jones C. Jones	.778	9	7/6/2008	ATL	vs	HOU	5	3	3	0	1	1	2	4	0	0	0	0	8	2	0	0	0	0
8	Jimmy Rollins J. Rollins	.778	9	7/2/2004	PHI	vs	BAL	5	2	3	0	0	0	1	4	0	0	1	0	3	0	0	0	2	0
9	Edgar Martinez E. Martinez	.778	9	6/24/2004	SEA	@	TEX	4	2	2	0	0	1	1	5	0	0	0	0	5	1	0	0	1	0
10	George Brett G. Brett	.778	9	6/6/1991	KCR	vs	TEX	6	0	4	1	0	0	0	3	0	0	0	0	5	1	0	0	1	0
11	Kevin Reimer K. Reimer	.778	9	6/6/1991	TEX	@	KCR	7	1	5	0	0	0	0	2	0	0	0	0	5	0	0	0	0	0
12	Dwight Evans D. Evans	.778	9	10/4/1980	BOS	vs	TOR	7	2	5	3	0	1	1	2	0	1	0	0	11	4	0	0	0	0
13	Reggie Smith R. Smith	.778	9	9/13/1974	STL	@	PHI	3	0	1	0	0	0	1	5	1	0	0	0	1	0	0	0	2	1
14	Cito Gaston C. Gaston	.778	9	5/23/1970	SDP	@	SFG	5	3	3	0	0	1	3	4	0	0	0	0	6	1	0	0	0	0
15	Willie Mays W. Mays	.778	9	5/23/1970	SFG	vs	SDP	6	3	4	0	0	2	4	3	0	1	0	0	10	2	0	0	1	0
16	Larry Doby L. Doby	.778	9	7/1/1952	CLE	vs	SLA	4	1	2	1	0	0	0	5	0	0	0	0	3	1	0		3	0
17	Stan Musial S. Musial	.778	9	9/3/1949	SLN	vs	CIN	5	2	3	0	1	0	3	3	1	0	0		5	1	0			0
18	Lloyd Waner L. Waner	.778	9	6/15/1929	PIT	vs	NYG	8	2	6	1	1	0	2	1	0	0	0	0	9	2	0
19	Home Run Baker H. Run Baker	.778	9	9/27/1912	PHA	vs	WSH	7	1	5	1	0	0	2	2	0	0	1		6	1	0
20	Orlando Hudson O. Hudson	.750	9	8/25/2006	ARI	vs	LAD	6	2	4	2	0	1	3	2	0	0	0	0	9	3	1	0	0	0
21	John Knight J. Knight	.750	9	9/1/1906	PHA	@	BSA	7	0	5	0	2	0	0	1	0	1	1		9	2	1
22	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
23	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
24	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
25	Xander Bogaerts X. Bogaerts	.667	9	9/15/2017	BOS	@	TBR	7	2	4	0	0	0	2	1	1	0	0	0	4	0	0	0	1	0