who has the highest playoff batting average of all-time with at least 20 plate appearances

Lloyd McClendon has the highest career batting average in the postseason when making 20+ plate appearances, with an average of .625.

	NAME	AVG	PA	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	TB	XBH	SH	SF	IBB	GIDP	OBP	SLG	OPS
1	Lloyd McClendon L. McClendon	.625	23	11	16	4	10	2	0	1	4	6	0	1	0	0	15	3	0	1	1	0	.696	.938	1.633
2	Dane Iorg D. Iorg	.522	25	13	23	4	12	5	1	0	4	2	0	0	0	0	19	6	0	0	0	0	.560	.826	1.386
3	Dave Robertson D. Robertson	.500	23	6	22	3	11	1	1	0	1	0	1	0	2	0	14	2	0		0	0	.522	.636	1.158
4	Tim Anderson T. Anderson	.485	33	7	33	6	16	2	0	0	1	0	0	5	0	0	18	2	0	0	0	0	.485	.545	1.030
5	Jay Johnstone J. Johnstone	.476	22	14	21	2	10	1	1	1	5	1	0	1	0	0	16	3	0	0	0	0	.500	.762	1.262
6	Max Carey M. Carey	.458	31	7	24	6	11	4	0	0	2	2	3	3	3	1	15	4	2		0	0	.552	.625	1.177
7	Bobby Brown B. Brown	.439	46	17	41	9	18	5	3	0	9	5	0	3	0	0	29	8	0		0	0	.500	.707	1.207
8	Jake Powell J. Powell	.435	27	8	23	8	10	1	0	1	5	4	0	5	1	1	14	2	0		0	1	.519	.609	1.127
9	Colby Rasmus C. Rasmus	.423	35	9	26	5	11	4	0	4	7	9	0	8	1	0	27	8	0	0	2	1	.571	1.038	1.610
10	Dwayne Murphy D. Murphy	.421	22	6	19	4	8	2	0	1	3	3	0	4	0	1	13	3	0	0	0	1	.500	.684	1.184
11	Ken Boswell K. Boswell	.421	20	8	19	6	8	0	0	2	5	1	0	2	0	0	14	2	0	0	0	0	.450	.737	1.187
12	Pepper Martin P. Martin	.418	60	15	55	14	23	7	1	1	9	5	0	6	7	2	35	9	0		0	0	.467	.636	1.103
13	Don Mattingly D. Mattingly	.417	25	5	24	3	10	4	0	1	6	1	0	5	0	0	17	5	0	0	0	1	.440	.708	1.148
14	Tommy Thevenow T. Thevenow	.417	26	8	24	5	10	1	0	1	4	0	1	1	0	0	14	2	1		0	0	.440	.583	1.023
15	Carlos Gonzalez C. Gonzalez	.412	38	9	34	5	14	2	1	1	2	4	0	7	2	1	21	4	0	0	0	0	.474	.618	1.091
16	Bill Bruton B. Bruton	.412	22	7	17	2	7	0	0	1	2	5	0	5	0	0	10	1	0	0	0	1	.545	.588	1.134
17	Sean Casey S. Casey	.410	41	12	39	3	16	5	0	2	9	1	1	4	0	0	27	7	0	0	0	0	.439	.692	1.131
18	Eric Young E. Young	.409	24	7	22	5	9	1	0	2	5	2	0	2	1	0	16	3	0	0	1	1	.458	.727	1.186
19	Bobby Doerr B. Doerr	.409	24	6	22	1	9	1	0	1	3	2	0	2	0	0	13	2	0		0	0	.458	.591	1.049
20	Fred Lynn F. Lynn	.407	61	15	54	8	22	4	0	2	13	5	0	8	0	0	32	6	1	1	0	2	.450	.593	1.043
21	Billy Hatcher B. Hatcher	.404	61	14	52	12	21	5	1	2	6	5	1	4	3	1	34	8	3	0	1	1	.466	.654	1.119
22	Jose Offerman J. Offerman	.400	53	14	45	8	18	1	1	1	9	8	0	3	1	1	24	3	0	0	0	1	.491	.533	1.024
23	Richie Zisk R. Zisk	.400	22	6	20	1	8	1	0	0	0	2	0	5	0	0	9	1	0	0	0	0	.455	.450	.905
24	Monte Irvin M. Irvin	.394	36	10	33	4	13	1	1	0	4	2	0	4	2	1	16	2	1	0	0	1	.429	.485	.913
25	Luis Robert Jr. L. Robert Jr.	.393	31	7	28	6	11	0	0	1	3	2	1	6	0	1	14	1	0	0	0	0	.452	.500	.952