Fernando Rodney was the oldest relief pitcher in 2019. He was 42 years old.

	NAME	AGE	SEASON	TM	G	W	L	W%	GS	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	Fernando Rodney F. Rodney	42	2019	TOT	55	0	5	.000	0	5.66	49	0	0	2	47.2	49	30	31	5	28	0	16	1	210	6	9.25	5.29	1.75	0.94	23.3	13.3	1.62	.344	5.85	9.25
2	Ben Zobrist B. Zobrist	38	2019	CHC	1	0	0		0	0.00	1	0	0	0	1.0	0	0	0	0	2	0	1	0	5	0	9.00	18.00	0.50	0.00	20.0	40.0	2.00	.000	0.00	0.00
3	CC Sabathia	38	2019	NYY	1	0	0		0	0.00	2	0	0	0	1.0	0	0	0	0	0	0	0	0	3	0	18.00	0.00		0.00	66.7	0.0	0.00	.000	0.00	0.00
4	Pat Neshek P. Neshek	38	2019	PHI	20	0	1	.000	0	5.00	9	0	0	3	18.0	23	10	11	5	2	0	6	0	79	0	4.50	1.00	4.50	2.50	11.4	2.5	1.39	.286	5.50	11.50
5	Ian Kinsler I. Kinsler	37	2019	SDP	1	0	0		0	0.00	0	0	0	0	1.0	1	0	0	0	2	1	1	0	6	0	0.00	18.00	0.00	0.00	0.0	33.3	3.00	.333	0.00	9.00
6	Oliver Perez O. Perez	37	2019	CLE	67	2	4	.333	0	3.98	48	0	0	1	40.2	38	18	20	5	12	3	4	2	173	1	10.62	2.66	4.00	1.11	27.7	6.9	1.23	.314	4.43	8.41
7	J.A. Happ	36	2019	NYY	1	0	0		0	1.80	6	0	0	0	5.0	4	1	1	0	1	0	0	0	19	1	10.80	1.80	6.00	0.00	31.6	5.3	1.00	.333	1.80	7.20
8	Darren O'Day D. O'Day	36	2019	ATL	8	0	0		0	1.69	6	0	0	0	5.1	3	1	1	0	1	1	0	0	21	0	10.13	1.69	6.00	0.00	28.6	4.8	0.75	.231	1.69	5.06
9	Carlos Torres C. Torres	36	2019	DET	4	0	0		0	7.50	8	0	0	0	6.0	9	5	5	2	1	1	1	0	29	1	12.00	1.50	8.00	3.00	27.6	3.4	1.67	.412	7.50	13.50
10	Jeff Mathis J. Mathis	36	2019	TEX	2	0	0		0	9.00	1	0	0	0	2.0	3	2	2	1	0	0	2	0	9	0	4.50	0.00		4.50	11.1	0.0	1.50	.286	9.00	13.50
11	Kendrys Morales K. Morales	36	2019	OAK	1	0	0		0	9.00	0	0	0	0	1.0	1	1	1	0	2	1	1	0	7	0	0.00	18.00	0.00	0.00	0.0	28.6	3.00	.250	9.00	9.00
12	Jason Vargas J. Vargas	36	2019	NYM	1	0	0		0	36.00	1	0	0	0	1.0	4	4	4	1	0	0	1	0	7	0	9.00	0.00		9.00	14.3	0.0	4.00	.600	36.00	36.00
13	Russell Martin R. Martin	36	2019	LAD	4	0	0		0	0.00	2	0	0	0	4.0	2	0	0	0	0	0	4	0	13	0	4.50	0.00		0.00	15.4	0.0	0.50	.182	0.00	4.50
14	Matt Albers M. Albers	36	2019	MIL	67	8	6	.571	0	5.13	57	0	0	4	59.2	53	34	34	8	29	3	13	3	258	2	8.60	4.37	1.97	1.21	22.1	11.2	1.37	.280	5.13	7.99
15	Sergio Romo S. Romo	36	2019	TOT	65	2	1	.667	0	3.43	60	0	0	20	60.1	50	23	27	7	17	2	33	3	249	3	8.95	2.54	3.53	1.04	24.1	6.8	1.11	.264	4.03	7.46
16	Zach Duke Z. Duke	36	2019	CIN	30	3	1	.750	0	5.01	18	0	0	0	23.1	21	13	13	4	18	2	4	1	106	0	6.94	6.94	1.00	1.54	17.0	17.0	1.67	.266	5.01	8.10
17	Seunghwan Oh S. Oh	36	2019	COL	21	3	1	.750	0	9.33	16	0	0	0	18.1	29	19	19	6	6	0	5	0	88	2	7.85	2.95	2.67	2.95	18.2	6.8	1.91	.383	9.33	14.24
18	Edinson Volquez E. Volquez	35	2019	TEX	7	0	0		0	0.00	4	0	0	0	6.2	4	0	0	0	2	0	1	0	23	0	5.40	2.70	2.00	0.00	17.4	8.7	0.90	.235	0.00	5.40
19	Alex Gordon A. Gordon	35	2019	KCR	2	0	0		0	19.29	0	0	0	0	2.1	8	5	5	1	2	0	1	0	17	0	0.00	7.71	0.00	3.86	0.0	11.8	4.29	.500	19.29	30.86
20	Mark Reynolds M. Reynolds	35	2019	COL	1	0	0		0	18.00	0	0	0	0	1.0	2	2	2	0	1	1	1	0	7	0	0.00	9.00	0.00	0.00	0.0	14.3	3.00	.400	18.00	18.00
21	Joe Smith J. Smith	35	2019	HOU	28	1	0	1.000	0	1.80	22	0	0	0	25.0	19	5	6	2	5	0	4	0	96	0	7.92	1.80	4.40	0.72	22.9	5.2	0.96	.254	2.16	6.84
22	Tony Barnette T. Barnette	35	2019	CHC	2	0	0		0	6.75	0	0	0	0	1.1	2	1	1	1	0	0	0	0	5	0	0.00	0.00		6.75	0.0	0.0	1.50	.250	6.75	13.50
23	Edwin Jackson E. Jackson	35	2019	TOT	5	1	1	.500	0	8.76	7	0	0	0	12.1	18	12	12	6	8	0	0	0	59	2	5.11	5.84	0.88	4.38	11.9	13.6	2.11	.316	8.76	13.14
24	Luke Gregerson L. Gregerson	35	2019	STL	6	0	0		0	7.94	2	0	0	0	5.2	11	5	5	0	1	0	3	0	27	0	3.18	1.59	2.00	0.00	7.4	3.7	2.12	.458	7.94	17.47
25	Jerry Blevins J. Blevins	35	2019	ATL	45	1	0	1.000	0	3.90	37	0	0	1	32.1	25	14	15	5	16	2	12	2	141	2	10.30	4.45	2.31	1.39	26.2	11.3	1.27	.247	4.18	6.96