highest batting average in playoff single season with at least 15 at bats

Mark Grace has the highest batting average with 15+ at-bats in a postseason, with an average of .647 in 1989.

Interpreted as:

highest batting average by a player in playoff single season with at least 15 at bats

	NAME	AVG	AB	SEASON	TM	G	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	OBP	SLG	OPS
1	Mark Grace M. Grace	.647	17	1989	CHC	5	3	11	3	1	1	8	4	0	1	1	0	22	19	5	0	1	2	0	.682	1.118	1.799
2	Babe Ruth B. Ruth	.625	16	1928	NYY	4	9	10	3	0	3	4	1	0	2	0	0	17	22	6	0		0	1	.647	1.375	2.022
3	Fred Lynn F. Lynn	.611	18	1982	CAL	5	4	11	2	0	1	5	2	0	3	0	0	20	16	3	0	0	0	1	.650	.889	1.539
4	Carlos Gonzalez C. Gonzalez	.588	17	2009	COL	4	5	10	2	0	1	1	2	0	1	2	1	19	15	3	0	0	0	0	.632	.882	1.514
5	Dante Bichette D. Bichette	.588	17	1995	COL	4	6	10	3	0	1	3	1	0	3	0	0	18	16	4	0	0	0	0	.611	.941	1.552
6	Jeff Mathis J. Mathis	.533	15	2009	LAA	7	2	8	5	0	0	1	0	0	4	0	0	16	13	5	1	0	0	0	.533	.867	1.400
7	Edgardo Alfonzo E. Alfonzo	.529	17	2003	SFG	4	3	9	4	0	0	5	1	0	1	0	0	18	13	4	0	0	0	0	.556	.765	1.320
8	Miguel Cairo M. Cairo	.529	17	2002	STL	5	4	9	1	0	1	5	0	1	2	0	1	18	13	2	0	0	0	0	.556	.765	1.320
9	Dane Iorg D. Iorg	.529	17	1982	STL	5	4	9	4	1	0	1	0	0	0	0	0	17	15	5	0	0	0	0	.529	.882	1.412
10	Lou Gehrig L. Gehrig	.529	17	1932	NYY	4	9	9	1	0	3	8	2	1	1	0	0	20	19	4	0		0	1	.600	1.118	1.718
11	Justin Turner J. Turner	.526	19	2015	LAD	5	2	10	6	0	0	4	1	0	3	1	0	20	16	6	0	0	1	0	.550	.842	1.392
12	Andruw Jones A. Jones	.526	19	2004	ATL	5	4	10	2	0	2	5	2	0	3	1	0	21	18	4	0	0	0	1	.571	.947	1.519
13	Terry Puhl T. Puhl	.526	19	1980	HOU	5	4	10	2	0	0	3	3	0	2	2	0	22	12	2	0	0	0	0	.591	.632	1.222
14	Manny Ramirez M. Ramirez	.520	25	2008	LAD	8	9	13	2	0	4	10	11	0	4	0	0	36	27	6	0	0	4	1	.667	1.080	1.747
15	Billy Hatcher B. Hatcher	.519	27	1990	CIN	8	8	14	5	1	1	4	2	1	2	0	1	31	24	7	1	0	1	1	.567	.889	1.456
16	Charlie Culberson C. Culberson	.500	16	2017	LAD	10	4	8	2	1	1	2	0	0	3	0	0	18	15	4	1	1	0	0	.471	.938	1.408
17	Derek Jeter D. Jeter	.500	16	2006	NYY	4	4	8	4	0	1	1	1	0	2	0	1	17	15	5	0	0	0	1	.529	.938	1.467
18	Derek Jeter D. Jeter	.500	16	2002	NYY	4	6	8	0	0	2	3	2	0	3	0	0	19	14	2	0	1	0	0	.526	.875	1.401
19	Vic Wertz V. Wertz	.500	16	1954	CLE	4	2	8	2	1	1	3	2	0	2	0	0	18	15	4	0	0	0	0	.556	.938	1.493
20	Billy Martin B. Martin	.500	24	1953	NYY	6	5	12	1	2	2	8	1	0	2	1	2	25	23	5	0		0	1	.520	.958	1.478
21	Johnny Lindell J. Lindell	.500	18	1947	NYY	6	3	9	3	1	0	7	5	1	2	0	0	24	14	4	0		0	1	.625	.778	1.403
22	Pepper Martin P. Martin	.500	24	1931	SLN	7	5	12	4	0	1	5	2	0	3	5	1	26	19	5	0		0	0	.538	.792	1.330
23	Mark Koenig M. Koenig	.500	18	1927	NYY	4	5	9	2	0	0	2	0	0	2	0	0	18	11	2	0		0	0	.500	.611	1.111
24	Dave Robertson D. Robertson	.500	22	1917	NYG	6	3	11	1	1	0	1	0	1	0	2	0	23	14	2	0		0	0	.522	.636	1.158
25	Brooks Robinson B. Robinson	.485	33	1970	BAL	8	8	16	4	0	2	7	0	0	3	0	0	34	26	6	0	1	0	0	.471	.788	1.258