Justin Verlander was the oldest active player in 2023. He was 40 years old.

	NAME	AGE	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Justin Verlander J. Verlander	40	2023	TOT
2	Charlie Morton C. Morton	39	2023	ATL
3	David Robertson D. Robertson	38	2023	TOT
4	Justin Turner J. Turner	38	2023	BOS	146	558	86	154	31	0	23	96	51	11	110	4	1	626	254	54	0	6	0	10	.276	.345	.455	.800	90	14.2	.346	114	10.9
5	Chris Martin C. Martin	37	2023	BOS	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
6	Yu Darvish Y. Darvish	36	2023	SDP
7	Luis García L. García	36	2023	SDP
8	Martín Maldonado M. Maldonado	36	2023	HOU	116	362	33	69	12	0	15	36	30	3	139	0	0	407	126	27	12	0	0	10	.191	.258	.348	.606	32	-17.7	.266	66	-16.4
9	Andrew McCutchen A. McCutchen	36	2023	PIT	112	390	55	100	19	0	12	43	75	4	100	11	3	473	155	31	0	4	1	8	.256	.378	.397	.776	68	10.6	.345	114	8.4
10	Wade Miley W. Miley	36	2023	MIL
11	Caleb Thielbar C. Thielbar	36	2023	MIN
12	Kirby Yates K. Yates	36	2023	ATL
13	Ryan Brasier R. Brasier	35	2023	TOT	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
14	Aroldis Chapman A. Chapman	35	2023	TOT	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
15	Alex Cobb A. Cobb	35	2023	SFG
16	Jacob deGrom J. deGrom	35	2023	TEX
17	Paul Goldschmidt P. Goldschmidt	35	2023	STL	154	593	89	159	31	0	25	80	87	3	161	11	2	686	265	56	0	3	6	12	.268	.363	.447	.810	102	18.1	.350	122	18.4
18	Kenley Jansen K. Jansen	35	2023	BOS	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
19	Clayton Kershaw C. Kershaw	35	2023	LAD
20	Craig Kimbrel C. Kimbrel	35	2023	PHI
21	Tommy Pham T. Pham	35	2023	TOT	129	426	55	109	27	3	16	68	47	2	106	22	3	481	190	46	0	6	1	11	.256	.328	.446	.774	64	5.5	.332	109	5.5
22	Brooks Raley B. Raley	35	2023	NYM	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
23	Donovan Solano D. Solano	35	2023	MIN	134	394	43	111	26	1	5	38	40	15	100	0	0	450	154	32	0	1	1	8	.282	.369	.391	.760	62	7.3	.338	115	8.2
24	Chris Bassitt C. Bassitt	34	2023	TOR
25	Travis d'Arnaud T. d'Arnaud	34	2023	ATL	74	267	31	60	13	0	11	39	21	3	67	0	0	292	106	24	0	1	0	6	.225	.288	.397	.685	30	-5.1	.297	83	-6.1