pitcher with highest win percentage in playoffs minimum 5 wins since 1980

Since 1980, David Robertson has the highest win percentage in the postseason when winning 5+ games, at 1.000.

	NAME	W	W%	L	G	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	David Robertson D. Robertson	6	1.000	0	42	0	3.04	57	0	0	1	47.1	37	16	16	6	16	1	11	3	193	3	10.84	3.04	3.56	1.14	29.5	8.3	1.12	.274	3.04	7.04
2	Mariano Rivera M. Rivera	8	.889	1	96	0	0.70	110	0	0	42	141.0	86	11	13	2	21	3	78	4	527	3	7.02	1.34	5.24	0.13	20.9	4.0	0.76	.215	0.83	5.49
3	Ryan Madson R. Madson	6	.857	1	57	0	2.73	70	0	0	2	56.0	57	17	17	7	18	2	11	4	241	4	11.25	2.89	3.89	1.13	29.0	7.5	1.34	.347	2.73	9.16
4	Curt Schilling C. Schilling	11	.846	2	19	19	2.23	120	4	2	0	133.1	104	33	37	12	25	3	0	0	525	1	8.10	1.69	4.80	0.81	22.9	4.8	0.97	.252	2.50	7.02
5	Juan Guzman J. Guzman	5	.833	1	8	8	2.44	41	0	0	0	51.2	42	14	17	1	27	2	0	4	221	5	7.14	4.70	1.52	0.17	18.6	12.2	1.34	.273	2.96	7.32
6	Fernando Valenzuela F. Valenzuela	5	.833	1	9	8	1.98	44	2	0	0	63.2	47	14	14	3	31	0	0	7	259	3	6.22	4.38	1.42	0.42	17.0	12.0	1.23	.243	1.98	6.64
7	John Smoltz J. Smoltz	15	.789	4	41	27	2.67	199	2	1	4	209.0	172	62	67	17	67	3	11	6	856	6	8.57	2.89	2.97	0.73	23.2	7.8	1.14	.272	2.89	7.41
8	Cristian Javier C. Javier	6	.750	2	17	5	2.68	60	0	0	0	43.2	22	13	13	7	23	3	0	0	177	1	12.37	4.74	2.61	1.44	33.9	13.0	1.03	.179	2.68	4.53
9	Nathan Eovaldi N. Eovaldi	9	.750	3	17	12	3.05	82	0	0	0	79.2	65	27	28	6	18	1	1	3	325	0	9.26	2.03	4.56	0.68	25.2	5.5	1.04	.271	3.16	7.34
10	Stephen Strasburg S. Strasburg	6	.750	2	9	8	1.46	71	0	0	0	55.1	44	9	13	4	8	1	0	1	218	1	11.55	1.30	8.88	0.65	32.6	3.7	0.94	.299	2.11	7.16
11	Orlando Hernandez O. Hernandez	9	.750	3	19	14	2.55	107	0	0	0	106.0	77	30	32	10	55	4	0	3	443	1	9.08	4.67	1.95	0.85	24.2	12.4	1.25	.251	2.72	6.54
12	Julio Urías J. Urías	8	.727	3	23	6	3.68	60	0	0	1	58.2	45	24	25	10	12	0	4	1	232	2	9.20	1.84	5.00	1.53	25.9	5.2	0.97	.233	3.84	6.90
13	Madison Bumgarner M. Bumgarner	8	.727	3	16	14	2.11	87	3	3	1	102.1	74	24	25	8	18	5	1	2	398	0	7.65	1.58	4.83	0.70	21.9	4.5	0.90	.236	2.20	6.51
14	David Cone D. Cone	8	.727	3	21	18	3.80	94	1	0	0	111.1	93	47	52	12	58	2	2	1	480	6	7.60	4.69	1.62	0.97	19.6	12.1	1.36	.258	4.20	7.52
15	Orel Hershiser O. Hershiser	8	.727	3	22	18	2.59	97	4	2	1	132.0	103	38	43	8	43	6	2	5	533	6	6.61	2.93	2.26	0.55	18.2	8.1	1.11	.251	2.93	7.02
16	Tim Lincecum T. Lincecum	5	.714	2	13	6	2.40	65	1	1	0	56.1	34	15	16	3	14	1	0	0	217	0	10.38	2.24	4.64	0.48	30.0	6.5	0.85	.231	2.56	5.43
17	Chris Carpenter C. Carpenter	10	.714	4	18	18	3.00	68	1	1	0	108.0	104	36	43	11	36	6	0	2	461	1	5.67	3.00	1.89	0.92	14.8	7.8	1.30	.274	3.58	8.67
18	Roy Oswalt R. Oswalt	5	.714	2	13	11	3.73	56	0	0	0	72.1	73	30	32	9	24	6	2	0	314	1	6.97	2.99	2.33	1.12	17.8	7.6	1.34	.292	3.98	9.08
19	Mike Stanton M. Stanton	5	.714	2	53	0	2.10	47	0	0	1	55.2	43	13	15	1	21	0	15	9	222	2	7.60	3.40	2.24	0.16	21.2	9.5	1.15	.275	2.43	6.95
20	Cliff Lee C. Lee	7	.700	3	11	11	2.52	89	3	0	0	82.0	66	23	27	2	10	1	0	0	320	2	9.77	1.10	8.90	0.22	27.8	3.1	0.93	.294	2.96	7.24
21	Josh Beckett J. Beckett	7	.700	3	14	13	3.07	99	3	3	0	93.2	67	32	32	11	21	4	0	1	366	3	9.51	2.02	4.71	1.06	27.0	5.7	0.94	.242	3.07	6.44
22	Livan Hernandez L. Hernandez	7	.700	3	12	10	3.97	47	1	0	0	68.0	67	30	32	6	36	4	0	3	305	1	6.22	4.76	1.31	0.79	15.4	11.8	1.51	.288	4.24	8.87
23	Freddy Garcia F. Garcia	6	.667	3	11	11	3.26	57	1	0	0	66.1	65	24	26	8	24	2	0	2	279	1	7.73	3.26	2.38	1.09	20.4	8.6	1.34	.303	3.53	8.82
24	Barry Zito B. Zito	6	.667	3	10	10	2.83	46	0	0	0	60.1	50	19	19	7	23	3	0	1	252	1	6.86	3.43	2.00	1.04	18.3	9.1	1.21	.249	2.83	7.46
25	David Wells D. Wells	10	.667	5	27	17	3.17	83	1	0	0	125.0	116	44	49	12	25	7	2	2	508	1	5.98	1.80	3.32	0.86	16.3	4.9	1.13	.273	3.53	8.35