Between the 1975 and 1995 seasons, Mike Flanagan pitched the most innings for the Orioles, with 2317.2 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	Mike Flanagan M. Flanagan	2317.2	450	141	116	.549	328	3.89	1,297	98	17	4	2,326	1,001	1,084	212	740	30	49	37	9,739	75	5.04	2.87	1.75	0.82	13.3	7.6	1.32	.283	4.21	100	3.78	95	9.03	51.6
2	Scott McGregor S. McGregor	2140.2	356	138	108	.561	309	3.99	904	83	23	5	2,245	949	1,031	235	518	26	24	26	8,982	28	3.80	2.18	1.75	0.99	10.1	5.8	1.29	.275	4.33	102	4.05	101	9.44	-11.1
3	Jim Palmer J. Palmer	2081.1	290	139	83	.626	278	2.98	1,035	113	27	2	1,819	689	768	170	622	23	6	14	8,461	32	4.48	2.69	1.66	0.74	12.2	7.4	1.17	.249	3.32	80	3.66	96	7.87	33.3
4	Dennis Martinez D. Martinez	1775.0	319	108	93	.537	243	4.16	858	69	10	5	1,822	820	899	187	583	39	37	24	7,544	50	4.35	2.96	1.47	0.95	11.4	7.7	1.35	.278	4.56	108	4.14	104	9.24	-37.3
5	Mike Boddicker M. Boddicker	1273.2	190	79	73	.520	180	3.73	836	53	13	0	1,198	528	595	126	444	39	6	24	5,350	38	5.91	3.14	1.88	0.89	15.6	8.3	1.29	.275	4.20	92	3.87	93	8.47	39.3
6	Storm Davis S. Davis	944.1	202	61	43	.587	123	3.63	539	27	4	5	898	381	413	61	318	10	36	27	3,945	26	5.14	3.03	1.69	0.58	13.7	8.1	1.29	.277	3.94	91	3.48	85	8.56	62.6
7	Ben McDonald B. McDonald	937.0	155	58	53	.523	142	3.89	638	21	6	0	838	405	434	100	334	20	5	16	3,906	26	6.13	3.21	1.91	0.96	16.3	8.6	1.25	.262	4.17	92	4.08	96	8.05	19.1
8	Mike Mussina M. Mussina	894.1	125	71	30	.703	125	3.22	556	23	10	0	802	320	334	86	205	8	0	9	3,593	16	5.60	2.06	2.71	0.87	15.5	5.7	1.13	.262	3.36	73	3.69	84	8.07	70
9	Sammy Stewart S. Stewart	866.0	307	51	45	.531	25	3.47	514	4	1	42	774	334	366	66	433	15	160	40	3,696	34	5.34	4.50	1.19	0.69	13.9	11.7	1.39	.265	3.80	88	4.06	101	8.04	-6
10	Tippy Martinez T. Martinez	752.1	499	52	40	.565	0	3.46	585	0	0	105	665	289	320	49	366	5	298	52	3,185	55	7.00	4.38	1.60	0.59	18.4	11.5	1.37	.283	3.83	90	3.47	88	7.96	40.4
11	Bob Milacki B. Milacki	703.0	121	37	37	.500	109	4.19	350	8	5	1	700	327	344	73	255	5	3	11	2,990	11	4.48	3.26	1.37	0.93	11.7	8.5	1.36	.272	4.40	107	4.26	109	8.96	-26.3
12	Jeff Ballard J. Ballard	695.1	144	36	51	.414	113	4.63	217	10	2	0	812	358	408	84	204	15	7	16	3,011	10	2.81	2.64	1.06	1.09	7.2	6.8	1.46	.292	5.28	117	4.68	118	10.51	-55
13	Mark Williamson M. Williamson	689.2	365	46	35	.568	15	3.86	397	2	0	21	701	296	321	62	226	9	142	51	2,927	19	5.18	2.95	1.76	0.81	13.6	7.7	1.34	.286	4.19	93	3.90	94	9.15	20.8
14	Ross Grimsley R. Grimsley	612.0	118	33	32	.508	85	4.12	201	21	3	0	648	280	301	68	178	3	9	10	2,580	12	2.96	2.62	1.13	1.00	7.8	6.9	1.35	.272	4.43	114	4.33	115	9.53	-42.1
15	Steve Stone S. Stone	499.1	84	40	21	.656	81	3.60	275	12	1	0	460	200	233	60	201	8	1	4	2,099	10	4.96	3.62	1.37	1.08	13.1	9.6	1.32	.257	4.20	93	4.43	112	8.29	-26.6
16	Ken Dixon K. Dixon	482.1	105	26	28	.481	68	4.66	377	5	1	6	480	250	266	85	178	4	21	17	2,083	19	7.03	3.32	2.12	1.59	18.1	8.5	1.36	.274	4.96	112	4.61	109	8.96	-19.9
17	Jamie Moyer J. Moyer	416.2	75	25	22	.532	66	4.41	242	3	1	0	429	204	214	52	106	11	3	5	1,744	2	5.23	2.29	2.28	1.12	13.9	6.1	1.28	.283	4.62	94	4.37	94	9.27	11.4
18	Dave Schmidt D. Schmidt	410.1	114	28	23	.549	49	4.39	183	4	2	3	453	200	217	51	100	6	23	9	1,742	8	4.01	2.19	1.83	1.12	10.5	5.7	1.35	.287	4.76	111	4.29	107	9.94	-10.3
19	Rudy May R. May	404.0	61	29	21	.580	58	3.68	176	16	5	0	399	165	187	36	120	5	1	5	1,684	3	3.92	2.67	1.47	0.80	10.5	7.1	1.28	.269	4.17	103	3.91	105	8.89	-9.6
20	Rick Sutcliffe R. Sutcliffe	403.1	65	26	25	.510	64	5.00	189	8	2	0	463	224	235	43	148	13	0	9	1,781	8	4.22	3.30	1.28	0.96	10.6	8.3	1.51	.303	5.24	120	4.50	109	10.33	-16.4
21	Mike Cuellar M. Cuellar	363.0	62	18	25	.419	55	4.04	137	19	6	1	358	163	175	25	134	3	4	10	1,524	12	3.40	3.32	1.02	0.62	9.0	8.8	1.36	.272	4.34	117	3.86	107	8.88	-11
22	Dave Johnson D. Johnson	353.1	66	21	24	.467	57	4.84	132	7	0	0	413	190	195	59	95	11	4	6	1,529	1	3.36	2.42	1.39	1.50	8.6	6.2	1.44	.287	4.97	125	5.12	131	10.52	-47.6
23	Gregg Olson G. Olson	350.1	320	17	21	.447	0	2.26	347	0	0	160	281	88	92	10	158	5	277	22	1,463	31	8.91	4.06	2.20	0.26	23.7	10.8	1.25	.287	2.36	57	2.60	66	7.22	53.5
24	Arthur Rhodes A. Rhodes	344.0	69	17	24	.415	59	5.70	273	5	3	0	344	218	223	47	188	4	3	5	1,529	12	7.14	4.92	1.45	1.23	17.9	12.3	1.55	.292	5.83	130	4.82	110	9.00	-17.2
25	Wayne Garland W. Garland	319.2	67	22	12	.647	26	2.96	159	14	4	5	304	105	118	17	95	7	23	15	1,335	7	4.48	2.67	1.67	0.48	11.9	7.1	1.25	.272	3.32	88	3.27	93	8.56	8