Jesse Orosco had the most games pitched when he didn't start, with 1,248 games.

Interpreted as:

most regular-season games pitched without a start by a player

	NAME	G	GS	W	L	W%	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	Jesse Orosco J. Orosco	1,248	0	87	78	.527	3.12	1,169	0	0	144	1277.0	1,035	442	499	112	568	34	501	85	5,374	40	8.24	4.00	2.06	0.79	21.8	10.6	1.26	.264	3.52	7.29
2	Mike Stanton M. Stanton	1,177	0	68	63	.519	3.93	892	0	0	84	1110.0	1,084	485	523	93	419	33	363	76	4,748	35	7.23	3.40	2.13	0.75	18.8	8.8	1.35	.299	4.24	8.79
3	John Franco J. Franco	1,119	0	90	87	.508	2.89	975	0	0	424	1245.2	1,166	400	466	81	495	22	774	78	5,312	54	7.04	3.58	1.97	0.59	18.4	9.3	1.33	.290	3.37	8.42
4	Mariano Rivera M. Rivera	1,105	0	79	57	.581	2.06	1,135	0	0	652	1233.2	934	282	305	63	266	44	952	41	4,870	13	8.28	1.94	4.27	0.46	23.3	5.5	0.97	.259	2.23	6.81
5	Mike Timlin M. Timlin	1,054	0	74	71	.510	3.64	859	0	0	141	1185.1	1,148	479	526	118	369	47	467	72	4,999	31	6.52	2.80	2.33	0.90	17.2	7.4	1.28	.286	3.99	8.72
6	Dan Plesac D. Plesac	1,050	0	62	67	.481	3.55	990	0	0	158	1003.0	907	396	439	98	370	14	422	52	4,229	41	8.88	3.32	2.68	0.88	23.4	8.7	1.27	.293	3.94	8.14
7	Kent Tekulve K. Tekulve	1,050	0	94	90	.511	2.85	779	0	0	184	1436.2	1,305	455	526	63	491	17	638	179	6,001	23	4.88	3.08	1.59	0.39	13.0	8.2	1.25	.267	3.30	8.18
8	Trevor Hoffman T. Hoffman	1,035	0	61	75	.449	2.87	1,133	0	0	601	1089.1	846	347	378	100	307	9	856	58	4,388	49	9.36	2.54	3.69	0.83	25.8	7.0	1.06	.263	3.12	6.99
9	Hoyt Wilhelm H. Wilhelm	1,018	0	124	103	.546	2.49	1,363	0	0	228	1872.1	1,436	518	636	125	661	51	651	58	7,619	83	6.55	3.18	2.06	0.60	17.9	8.7	1.12	.242	3.06	6.90
10	Lee Smith L. Smith	1,016	0	71	87	.449	2.98	1,225	0	0	478	1252.1	1,095	415	456	87	474	9	802	100	5,230	46	8.80	3.41	2.58	0.63	23.4	9.1	1.25	.293	3.28	7.87
11	Roberto Hernandez R. Hernandez	1,007	0	66	71	.482	3.42	940	0	0	326	1060.0	992	403	465	95	457	35	667	53	4,583	49	7.98	3.88	2.06	0.81	20.5	10.0	1.37	.294	3.95	8.42
12	Michael Jackson M. Jackson	998	0	61	63	.492	3.33	983	0	0	142	1154.2	948	427	467	119	440	56	422	80	4,810	34	7.66	3.43	2.23	0.93	20.4	9.1	1.20	.258	3.64	7.39
13	Todd Jones T. Jones	981	0	58	62	.483	3.95	866	0	0	319	1067.2	1,063	468	513	93	443	38	619	62	4,629	43	7.30	3.73	1.95	0.78	18.7	9.6	1.41	.304	4.32	8.96
14	Rich Gossage R. Gossage	965	0	115	85	.575	2.77	1,340	0	0	310	1556.2	1,235	479	537	98	628	38	681	87	6,408	56	7.75	3.63	2.13	0.57	20.9	9.8	1.20	.264	3.10	7.14
15	Fernando Rodney F. Rodney	951	0	48	71	.403	3.80	943	0	0	327	933.0	817	394	433	73	464	52	590	38	4,064	65	9.10	4.48	2.03	0.70	23.2	11.4	1.37	.294	4.18	7.88
16	Francisco Rodriguez F. Rodriguez	948	0	52	53	.495	2.86	1,142	0	0	437	976.0	738	310	336	98	389	17	677	42	4,011	68	10.53	3.59	2.94	0.90	28.5	9.7	1.15	.271	3.10	6.81
17	LaTroy Hawkins L. Hawkins	944	0	49	50	.495	3.32	685	0	0	127	949.0	932	350	382	78	270	10	373	32	3,964	43	6.50	2.56	2.54	0.74	17.3	6.8	1.27	.292	3.62	8.84
18	Kenley Jansen K. Jansen	934	0	54	40	.574	2.57	1,278	0	0	475	927.1	610	265	284	88	282	32	700	20	3,680	21	12.40	2.74	4.53	0.85	34.7	7.7	0.96	.261	2.76	5.92
19	Jose Mesa J. Mesa	927	0	53	69	.434	3.95	753	0	0	321	984.0	1,007	432	475	96	419	40	633	51	4,321	58	6.89	3.83	1.80	0.88	17.4	9.7	1.45	.302	4.34	9.21
20	Gene Garber G. Garber	922	0	94	108	.465	3.30	913	0	0	218	1452.2	1,404	533	624	113	424	37	609	151	6,083	29	5.66	2.63	2.15	0.70	15.0	7.0	1.26	.281	3.87	8.70
21	Lindy McDaniel L. McDaniel	913	0	119	88	.575	3.14	1,165	0	0	174	1694.2	1,590	591	682	122	486	11	577	120	7,019	92	6.19	2.58	2.40	0.65	16.6	6.9	1.23	.280	3.62	8.44
22	Rollie Fingers R. Fingers	907	0	107	101	.514	2.73	1,183	0	0	341	1505.2	1,276	456	502	97	429	29	709	105	6,104	37	7.07	2.56	2.76	0.58	19.4	7.0	1.13	.270	3.00	7.63
23	Sparky Lyle S. Lyle	899	0	99	76	.566	2.88	873	0	0	238	1390.1	1,292	445	519	84	481	14	634	81	5,796	68	5.65	3.11	1.81	0.54	15.1	8.3	1.28	.278	3.36	8.36
24	David Weathers D. Weathers	895	0	55	61	.474	3.80	758	0	0	75	1018.0	986	430	468	102	445	44	304	65	4,427	23	6.70	3.93	1.70	0.90	17.1	10.1	1.41	.287	4.14	8.72
25	Mike Myers M. Myers	883	0	25	24	.510	4.29	429	0	0	14	541.2	525	258	278	58	256	43	195	33	2,385	10	7.13	4.25	1.68	0.96	18.0	10.7	1.44	.292	4.62	8.72