Hoyt Wilhelm has the most career at-bats by a relief pitcher, with 305 at-bats.

	NAME	AB	G	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Hoyt Wilhelm H. Wilhelm	305	1,018	20	31	3	1	1	18	20	0	127	0	1	350	39	5	24	1	0	5	.102	.156	.128	.284
2	Lindy McDaniel L. McDaniel	240	798	12	31	4	0	2	6	4	1	105	0	0	264	41	6	19	0	0	1	.129	.147	.171	.318
3	Jack Quinn J. Quinn	204	313	17	41	7	1	3		14	0		0		230	59	11	12				.201	.252	.289	.542
4	Murry Dickson M. Dickson	202	287	14	52	10	1	1	14	1	0	17	0	0	210	67	12	7	0	0	6	.257	.261	.332	.593
5	Bill Sherdel B. Sherdel	200	241	16	48	7	0	2		10	0	20	0		216	61	9	6				.240	.276	.305	.581
6	Pete Appleton P. Appleton	196	268	15	45	5	4	0	15	6	0	38	0		207	58	9	5			2	.230	.252	.296	.548
7	Eddie Rommel E. Rommel	194	252	25	41	6	1	0	11	19	0	27	0		224	49	7	11				.211	.282	.253	.534
8	Doc Crandall D. Crandall	192	169	22	53	3	9	1		13	1		2		209	77	13	3				.276	.325	.401	.726
9	Johnny Klippstein J. Klippstein	190	550	11	18	2	0	2	6	3	0	85	0	0	206	26	4	13	0	0	4	.095	.109	.137	.246
10	Johnny Murphy J. Murphy	190	375	18	27	8	0	0	9	19	1	66	1		227	35	8	17			2	.142	.224	.184	.408
11	Jack Russell J. Russell	189	375	18	29	4	3	0	13	17	0	79	0		211	39	7	5			1	.153	.223	.206	.430
12	Mace Brown M. Brown	187	332	15	27	4	0	0	13	5	0	45	0		206	31	4	14			1	.144	.167	.166	.332
13	Joe Heving J. Heving	187	390	14	32	6	0	0	7	10	1	28	0		214	38	6	16			1	.171	.217	.203	.420
14	Syl Johnson S. Johnson	187	333	17	37	5	2	1	16	6	1	57	0		196	49	8	2			1	.198	.227	.262	.489
15	Charlie Root C. Root	186	291	12	36	4	1	2	18	11	2	59	0		212	48	7	13			1	.194	.246	.258	.504
16	Stu Miller S. Miller	178	611	12	24	4	1	0	9	12	1	47	1	1	210	30	5	19	0	0	2	.135	.194	.169	.362
17	Waite Hoyt W. Hoyt	170	249	9	26	1	2	0	15	12	0	26	0		188	31	3	6				.153	.209	.182	.391
18	Fred Heimach F. Heimach	169	169	15	31	8	1	1	8	6	0	37	1		177	44	10	2				.183	.211	.260	.472
19	Firpo Marberry F. Marberry	167	365	16	31	6	0	0	14	5	2	38	1		188	37	6	14				.186	.218	.222	.440
20	Ron Perranoski R. Perranoski	166	729	5	15	1	1	0	3	10	0	92	0	0	189	18	2	13	0	0	1	.090	.142	.108	.250
21	Allen Russell A. Russell	166	233	14	36	3	0	0		19	1	59	0		199	39	3	13				.217	.301	.235	.536
22	Don McMahon D. McMahon	165	872	7	22	3	0	0	9	9	0	87	0	0	181	25	3	7	0	0	3	.133	.178	.152	.330
23	Joe Haynes J. Haynes	164	232	21	32	1	0	1	14	6	1	33	1	0	175	36	2	4			4	.195	.228	.220	.448
24	Chad Kimsey C. Kimsey	161	188	26	51	9	2	6	25	12	1	35	2		176	82	17	2				.317	.368	.509	.877
25	Bob Smith B. Smith	161	206	11	37	5	2	0	14	2	0	10	0		168	46	7	5				.230	.239	.286	.525