Justin Turner was the oldest active player in 2025. He was 40 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	ERA-	FIP	FIP-	H/9	PRAA
1	Justin Turner J. Turner	40	2025	CHC
2	Yu Darvish Y. Darvish	38	2025	SDP	15	5	5	.500	15	5.38	68	0	0	0	72.0	66	43	44	14	19	6	0	0	296	4	8.50	2.38	3.58	1.75	23.0	6.4	1.18	.275	5.50	133	4.81	118	8.25	-5.8
3	Aroldis Chapman A. Chapman	37	2025	BOS	67	5	3	.625	0	1.17	85	0	0	32	61.1	28	8	9	3	15	0	43	0	228	6	12.47	2.20	5.67	0.44	37.3	6.6	0.70	.200	1.32	27	1.73	41	4.11	16.8
4	Jacob deGrom J. deGrom	37	2025	TEX	30	12	8	.600	30	2.97	185	0	0	0	172.2	122	57	57	26	37	3	0	0	669	3	9.64	1.93	5.00	1.36	27.7	5.5	0.92	.230	2.97	73	3.64	86	6.36	11.7
5	Brooks Raley B. Raley	37	2025	NYM	30	3	1	.750	0	2.45	25	0	0	0	25.2	14	7	7	0	6	2	1	0	99	0	8.77	2.10	4.17	0.00	25.3	6.1	0.78	.212	2.45	61	2.12	52	4.91	5.7
6	Blake Treinen B. Treinen	37	2025	LAD	32	2	7	.222	0	5.40	36	0	0	2	26.2	30	16	18	4	19	2	9	4	129	1	12.15	6.41	1.89	1.35	27.9	14.7	1.84	.382	6.07	131	4.74	112	10.13	-1.5
7	Travis d'Arnaud T. d'Arnaud	36	2025	LAA
8	Liam Hendriks L. Hendriks	36	2025	BOS	14	0	2	.000	0	6.59	12	0	0	0	13.2	12	10	11	2	7	1	6	0	59	0	7.90	4.61	1.71	1.32	20.3	11.9	1.39	.270	7.24	152	5.03	119	7.90	-1.2
9	Chris Sale C. Sale	36	2025	ATL	21	7	5	.583	20	2.58	165	0	0	0	125.2	102	36	38	11	32	11	0	0	510	3	11.82	2.29	5.16	0.79	32.4	6.3	1.07	.313	2.72	61	2.67	66	7.31	19.6
10	Jose Altuve J. Altuve	35	2025	HOU
11	Huascar Brazobán H. Brazobán	35	2025	NYM	52	5	2	.714	3	3.57	57	0	0	2	63.0	51	25	29	6	27	4	6	1	262	2	8.14	3.86	2.11	0.86	21.8	10.3	1.24	.268	4.14	88	4.03	99	7.29	0.4
12	Fernando Cruz F. Cruz	35	2025	NYY	49	3	4	.429	0	3.56	72	0	0	2	48.0	33	19	21	5	24	3	4	0	200	5	13.50	4.50	3.00	0.94	36.0	12.0	1.19	.292	3.94	87	3.17	74	6.19	5.9
13	Nathan Eovaldi N. Eovaldi	35	2025	TEX	22	11	3	.786	22	1.73	129	1	1	0	130.0	90	25	28	10	21	7	0	1	496	6	8.93	1.45	6.14	0.69	26.0	4.2	0.85	.243	1.94	42	2.79	66	6.23	20.8
14	Freddie Freeman F. Freeman	35	2025	LAD
15	Sonny Gray S. Gray	35	2025	STL	32	14	8	.636	32	4.28	201	1	1	0	180.2	185	86	93	25	38	3	0	0	753	2	10.01	1.89	5.29	1.25	26.7	5.0	1.23	.329	4.63	104	3.38	84	9.22	13.5
16	Kyle Higashioka K. Higashioka	35	2025	TEX
17	Tim Hill T. Hill	35	2025	NYY	70	4	4	.500	0	3.09	37	0	0	0	67.0	58	23	27	8	16	0	18	3	269	1	4.97	2.15	2.31	1.07	13.8	5.9	1.10	.240	3.63	76	4.29	100	7.79	0.1
18	Casey Kelly C. Kelly	35	2025	AZ	2	0	0		0	0.00	0	0	0	0	1.2	1	0	0	0	1	0	2	0	6	1	0.00	5.40	0.00	0.00	0.0	16.7	1.20	.200	0.00	0	4.93	123	5.40	-0.2
19	Seth Lugo S. Lugo	35	2025	KCR	26	8	7	.533	26	4.15	125	0	0	0	145.1	133	67	70	27	55	6	0	1	611	5	7.74	3.41	2.27	1.67	20.5	9.0	1.29	.266	4.33	97	5.08	122	8.24	-14.7
20	Salvador Perez S. Perez	35	2025	KCR
21	Colin Rea C. Rea	35	2025	CHC	32	11	7	.611	27	3.95	127	0	0	1	159.1	155	70	73	20	44	6	3	0	662	2	7.17	2.49	2.89	1.13	19.2	6.6	1.25	.290	4.12	97	4.11	101	8.76	-1.2
22	Paul Sewald P. Sewald	35	2025	TOT	22	1	1	.500	0	4.58	20	0	0	2	19.2	18	10	11	4	6	0	5	0	81	0	9.15	2.75	3.33	1.83	24.7	7.4	1.22	.275	5.03	113	4.65	113	8.24	-1.2
23	George Springer G. Springer	35	2025	TOR
24	Giancarlo Stanton G. Stanton	35	2025	NYY
25	Albert Suárez A. Suárez	35	2025	BAL	5	2	0	1.000	1	2.31	10	0	0	0	11.2	9	3	4	0	2	1	3	1	44	4	7.71	1.54	5.00	0.00	22.7	4.5	0.94	.290	3.09	58	2.19	53	6.94	2.5