Vic Willis has the best career ERA for the Pirates, with an ERA of 2.08.

Interpreted as:

best with a minimum of 750 IP pitcher in pirates history

	NAME	ERA	IP	G	W	L	W%	GS	SO	CG	SHO	SV	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Vic Willis V. Willis	2.08	1209.0	160	89	46	.659	146	423	108	23	3	1,011	280	359	9	297	22	14		4,743	18	3.15	2.21	1.42	0.07	8.9	6.3	1.08	.251	2.67	84	2.41	92	7.53	28.6
2	Lefty Leifield L. Leifield	2.38	1578.0	239	109	84	.565	191	546	125	28	7	1,403	417	579	22	481	76	37		6,326	16	3.11	2.74	1.14	0.13	8.6	7.6	1.19	.266	3.30	86	2.91	102	8.00	-8.8
3	Sam Leever S. Leever	2.47	2660.2	388	194	100	.660	299	847	241	39	13	2,449	731	1,023	29	587	88	75		10,662	46	2.87	1.99	1.44	0.10	7.9	5.5	1.14	.266	3.46	81	2.84	92	8.28	74.2
4	Deacon Phillippe D. Phillippe	2.50	2286.0	330	168	92	.646	251	861	209	25	11	2,187	636	893	31	299	52	68		9,065	42	3.39	1.18	2.88	0.12	9.5	3.3	1.09	.276	3.52	85	2.46	81	8.61	149.2
5	Bob Harmon B. Harmon	2.60	769.2	121	39	52	.429	88	216	59	9	4	719	222	298	17	168	11	22		3,107	8	2.53	1.96	1.29	0.20	7.0	5.4	1.15	.260	3.48	97	2.80	102	8.41	-5
6	Howie Camnitz H. Camnitz	2.63	1754.1	277	116	84	.580	196	806	116	19	13	1,528	513	689	31	532	55	69		7,036	33	4.13	2.73	1.52	0.16	11.5	7.6	1.17	.267	3.53	90	2.76	93	7.84	37.3
7	Kent Tekulve K. Tekulve	2.68	1017.1	722	70	61	.534	0	552	0	0	158	900	303	356	41	367	13	470	128	4,235	17	4.88	3.25	1.50	0.36	13.0	8.7	1.25	.263	3.15	73	3.24	88	7.96	48.1
8	Wilbur Cooper W. Cooper	2.74	3199.0	469	202	159	.560	369	1,191	263	33	14	3,074	974	1,241	79	762	93	78		13,123	43	3.35	2.14	1.56	0.22	9.1	5.8	1.20	.272	3.49	84	3.03	93	8.65	90.3
9	Babe Adams B. Adams	2.74	2991.1	481	194	139	.583	353	1,036	205	44	16	2,832	911	1,125	67	428	47	90		11,926	26	3.12	1.29	2.42	0.20	8.7	3.6	1.09	.267	3.38	85	2.72	83	8.52	179.2
10	Frank Miller F. Miller	2.75	769.0	123	41	49	.456	97	286	54	12	2	673	235	292	12	180	24	21		3,111	12	3.35	2.11	1.59	0.14	9.2	5.8	1.11	.253	3.42	99	2.58	94	7.88	15
11	Jesse Tannehill J. Tannehill	2.75	1508.0	192	116	58	.667	171	466	149	17	5	1,561	461	663	11	243	71	20		6,182	10	2.78	1.45	1.92	0.07	7.5	3.9	1.20	.288	3.96	78	2.98	84	9.32	88.5
12	Ed Morris E. Morris	2.81	2104.0	241	129	102	.558	240	890	235	25	1	1,955	656	1,037	34	412	22	1		8,719	87	3.81	1.76	2.16	0.15	10.2	4.7	1.13	.262	4.44	88	2.95	94	8.36	9.7
13	Jack Chesbro J. Chesbro	2.89	938.2	122	70	38	.648	104	349	92	17	3	888	301	407	12	252	58	16		3,875	20	3.35	2.42	1.38	0.12	9.0	6.5	1.21	.273	3.90	86	3.24	96	8.51	9.6
14	Doug Drabek D. Drabek	3.02	1362.2	199	92	62	.597	196	820	36	16	0	1,227	457	506	112	337	21	1	25	5,511	34	5.42	2.23	2.43	0.74	14.9	6.1	1.15	.264	3.34	84	3.45	94	8.10	34.4
15	Bob Veale B. Veale	3.06	1868.2	341	116	91	.560	255	1,652	78	20	6	1,630	636	731	87	839	29	31	59	7,924	90	7.96	4.04	1.97	0.42	20.8	10.6	1.32	.290	3.52	87	2.76	83	7.85	122.5
16	Al McBean A. McBean	3.08	1016.0	376	65	43	.602	75	548	22	5	59	1,001	348	404	56	342	28	168	52	4,276	29	4.85	3.03	1.60	0.50	12.8	8.0	1.32	.286	3.58	89	3.25	97	8.87	12.3
17	Pud Galvin P. Galvin	3.10	2084.2	246	126	110	.534	241	434	225	17	0	2,242	719	1,166	54	370	42	5		8,874	58	1.87	1.60	1.17	0.23	4.9	4.2	1.25	.275	5.03	95	3.43	103	9.68	-56.6
18	Mark Baldwin M. Baldwin	3.14	880.1	110	47	55	.461	105	354	93	2	1	838	307	554	21	422	45	5		3,941	41	3.62	4.31	0.84	0.21	9.0	10.7	1.43	.264	5.66	96	3.58	108	8.57	-31.2
19	Dock Ellis D. Ellis	3.16	1430.1	231	96	80	.545	208	869	51	12	0	1,356	502	598	78	438	36	6	52	5,996	28	5.47	2.76	1.98	0.49	14.5	7.3	1.25	.279	3.76	90	3.00	88	8.53	68.6
20	John Candelaria J. Candelaria	3.17	1873.0	345	124	87	.588	271	1,159	45	9	16	1,763	660	731	172	436	26	42	45	7,651	13	5.57	2.10	2.66	0.83	15.1	5.7	1.17	.272	3.51	86	3.39	92	8.47	61.3
21	Burleigh Grimes B. Grimes	3.26	830.1	132	48	42	.533	92	260	58	7	5	818	301	398	28	237	20	34		3,517	10	2.82	2.57	1.10	0.30	7.4	6.7	1.27	.266	4.31	88	3.54	94	8.87	31.3
22	Cy Blanton C. Blanton	3.28	955.1	155	58	51	.532	129	508	63	13	4	945	348	432	43	246	13	15		4,014	22	4.79	2.32	2.07	0.41	12.7	6.1	1.25	.282	4.07	83	3.41	84	8.90	71.2
23	Jim Rooker J. Rooker	3.29	1317.2	213	82	65	.558	187	672	47	8	6	1,227	481	561	99	479	14	10	47	5,542	40	4.59	3.27	1.40	0.68	12.1	8.6	1.29	.264	3.83	90	3.70	101	8.38	-5.2
24	Max Butcher M. Butcher	3.34	1171.2	202	67	60	.528	154	296	74	13	5	1,249	435	517	52	328	11	27		5,035	11	2.27	2.52	0.90	0.40	5.9	6.5	1.35	.275	3.97	90	3.53	95	9.59	25.6
25	Earl Hamilton E. Hamilton	3.35	970.2	169	55	55	.500	107	268	53	5	7	1,005	361	433	22	271	17	47		4,115	19	2.48	2.51	0.99	0.20	6.5	6.6	1.31	.278	4.01	95	3.46	97	9.32	12.7