Between the 1882 and 1956 seasons, Wilbur Cooper pitched the most innings for the Pirates, with 3199 innings.

	NAME	IP	G	W	L	W%	GS	ERA	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	Wilbur Cooper W. Cooper	3199.0	469	202	159	.560	369	2.74	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
2	Babe Adams B. Adams	2991.1	481	194	139	.583	353	2.74	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
3	Sam Leever S. Leever	2660.2	388	194	100	.660	299	2.47	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	2286.0	330	168	92	.646	251	2.50	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	Rip Sewell R. Sewell	2108.2	385	143	97	.596	243	3.43	634	137	20	15	2,082	804	968	114	740	23	86		9,041	30	2.71	3.16	0.86	0.49	7.0	8.2	1.34	.261	4.13	92	3.77	99	8.89	6.8
6	Ed Morris E. Morris	2104.0	241	129	102	.558	240	2.81	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
7	Pud Galvin P. Galvin	2084.2	246	126	110	.534	241	3.10	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
8	Ray Kremer R. Kremer	1954.2	308	143	85	.627	247	3.76	516	134	14	9	2,108	816	950	123	483	29	37		8,330	23	2.38	2.22	1.07	0.57	6.2	5.8	1.33	.277	4.37	88	4.18	97	9.71	23.9
9	Howie Camnitz H. Camnitz	1754.1	277	116	84	.580	196	2.63	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
10	Frank Killen F. Killen	1661.1	213	112	82	.577	201	3.97	467	163	9	0	1,869	733	1,056	31	519	54	10		7,251	32	2.53	2.81	0.90	0.17	6.4	7.2	1.44	.297	5.72	92	4.03	92	10.13	51.6
11	Lefty Leifield L. Leifield	1578.0	239	109	84	.565	191	2.38	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
12	Bill Swift B. Swift	1555.0	305	91	79	.535	164	3.57	592	78	7	18	1,596	616	712	94	310	30	106		6,519	9	3.43	1.79	1.91	0.54	9.1	4.8	1.23	.273	4.12	92	3.72	93	9.24	50.5
13	Jesse Tannehill J. Tannehill	1508.0	192	116	58	.667	171	2.75	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
14	Larry French L. French	1502.2	254	87	83	.512	183	3.50	475	104	15	9	1,646	585	736	73	397	19	46		6,471	17	2.84	2.38	1.20	0.44	7.3	6.1	1.36	.286	4.41	85	3.94	95	9.86	35.2
15	Johnny Morrison J. Morrison	1363.2	242	89	71	.556	154	3.52	478	85	13	14	1,377	533	621	43	429	25	61		5,749	28	3.15	2.83	1.11	0.28	8.3	7.5	1.32	.279	4.10	87	3.72	92	9.09	50.4
16	Lee Meadows L. Meadows	1248.1	183	88	52	.629	157	3.50	355	93	8	1	1,351	486	592	42	286	25	15		5,264	11	2.56	2.06	1.24	0.30	6.7	5.4	1.31	.287	4.27	86	3.62	88	9.74	67.1
17	Murry Dickson M. Dickson	1216.1	228	66	85	.437	137	3.83	477	69	8	11	1,255	517	601	122	398	18	63		5,186	10	3.53	2.94	1.20	0.90	9.2	7.7	1.36	.272	4.45	91	4.05	96	9.29	25.4
18	Vic Willis V. Willis	1209.0	160	89	46	.659	146	2.08	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
19	Bob Friend B. Friend	1190.1	229	59	76	.437	151	4.01	519	49	10	6	1,244	530	616	104	404	11	37	22	5,119	16	3.92	3.05	1.28	0.79	10.1	7.9	1.38	.279	4.66	100	3.73	92	9.41	44.2
20	Max Butcher M. Butcher	1171.2	202	67	60	.528	154	3.34	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
21	Pink Hawley P. Hawley	1133.2	145	71	61	.538	132	3.76	367	114	6	1	1,193	473	660	16	373	87	12		4,920	32	2.91	2.96	0.98	0.13	7.5	7.6	1.38	.289	5.24	87	4.17	96	9.47	19.5
22	Heinie Meine H. Meine	995.1	164	66	50	.569	132	3.95	199	60	7	3	1,120	437	523	47	285	25	18		4,335	16	1.80	2.58	0.70	0.42	4.6	6.6	1.41	.284	4.73	98	4.23	104	10.13	-15.8
23	Bob Klinger B. Klinger	990.2	209	62	58	.517	129	3.74	329	48	7	9	1,062	412	489	40	309	18	46		4,275	21	2.99	2.81	1.06	0.36	7.7	7.2	1.38	.286	4.44	101	3.56	94	9.65	23.9
24	Red Ehret R. Ehret	977.0	124	53	59	.473	109	3.79	273	95	5	0	1,053	411	655	22	326	55	15		4,310	27	2.51	3.00	0.84	0.20	6.3	7.6	1.41	.284	6.03	86	4.09	94	9.70	22.8
25	Earl Hamilton E. Hamilton	970.2	169	55	55	.500	107	3.35	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