Rich Hill and Albert Pujols were tied for the oldest in 2021. They were 41 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	Rich Hill R. Hill	41	2021	TOT	16	24	0	3	0	0	0	0	0	0	10	0	0	26	3	0	2	0	0	2	.125	.125	.125	.250	-1	-4.4	.110	-34	-4.4
2	Albert Pujols A. Pujols	41	2021	TOT	109	275	29	65	3	0	17	50	14	5	45	2	0	296	119	20	0	2	3	14	.236	.284	.433	.717	33	-2.9	.302	89	-3.8
3	Nelson Cruz N. Cruz	40	2021	TOT	140	513	79	136	21	1	32	86	51	7	126	3	0	580	255	54	0	9	10	14	.265	.334	.497	.832	86	15.3	.346	123	16.3
4	Oliver Perez O. Perez	39	2021	CLE	2	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
5	Adam Wainwright A. Wainwright	39	2021	STL	33	57	1	7	2	0	0	4	3	0	25	0	0	74	9	2	14	0	0	2	.123	.167	.158	.325	-1	-10.1	.149	-9	-10.3
6	John Axford J. Axford	38	2021	MIL	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
7	Miguel Cabrera M. Cabrera	38	2021	DET	130	472	48	121	16	0	15	75	40	5	118	0	0	526	182	31	0	9	0	21	.256	.316	.386	.701	60	-4.2	.305	92	-4.9
8	J.A. Happ	38	2021	TOT	10	14	0	0	0	0	0	0	1	0	5	0	0	15	0	0	0	0	0	0	.000	.067	.000	.067	-2	-3.3	.046	-76	-3.4
9	Jeff Mathis J. Mathis	38	2021	ATL	3	9	0	0	0	0	0	0	0	0	5	0	0	9	0	0	0	0	0	0	.000	.000	.000	.000	-1	-2.3	.000	-110	-2.4
10	Yadier Molina Y. Molina	38	2021	STL	121	440	45	111	19	0	11	66	24	5	79	3	0	472	163	30	0	3	1	16	.252	.297	.370	.667	47	-9.7	.290	82	-10.9
11	Darren O'Day D. O'Day	38	2021	NYY
12	Sergio Romo S. Romo	38	2021	OAK	4	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
13	Ervin Santana E. Santana	38	2021	KCR	3	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
14	Drew Butera D. Butera	37	2021	LAA	12	32	1	3	1	0	0	5	0	0	16	0	0	36	4	1	3	1	0	0	.094	.091	.125	.216	-2	-6.7	.091	-54	-6.8
15	Jesse Chavez J. Chavez	37	2021	ATL	30	3	0	0	0	0	0	0	0	0	3	0	0	3	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.8	.000	-110	-0.8
16	Robinson Chirinos R. Chirinos	37	2021	CHC	45	97	13	22	5	1	5	15	9	5	36	0	0	112	44	11	1	0	0	2	.227	.324	.454	.778	16	2	.336	110	1.4
17	Brett Gardner B. Gardner	37	2021	NYY	140	387	47	86	16	4	10	39	60	3	100	4	0	461	140	30	5	6	0	3	.222	.327	.362	.689	52	-3.6	.305	95	-3.1
18	Yuli Gurriel Y. Gurriel	37	2021	HOU	143	530	83	169	31	0	15	81	59	4	68	1	1	605	245	46	0	12	2	16	.319	.383	.462	.846	98	24.4	.363	133	24.3
19	Zack Greinke Z. Greinke	37	2021	HOU	1	2	0	0	0	0	0	0	0	0	1	0	0	2	0	0	0	0	0	0	.000	.000	.000	.000	0	-0.5	.000	-113	-0.5
20	Scott Kazmir S. Kazmir	37	2021	SFG	5	3	0	0	0	0	0	0	0	0	2	0	0	4	0	0	1	0	0	0	.000	.000	.000	.000	-1	-1	.000	-105	-1
21	Jon Lester J. Lester	37	2021	TOT	27	48	3	8	2	0	1	3	2	0	24	0	0	51	13	3	1	0	0	0	.167	.200	.271	.471	2	-4.6	.205	25	-4.8
22	Jed Lowrie J. Lowrie	37	2021	OAK	139	457	55	112	28	0	14	69	49	2	108	0	0	512	182	42	0	4	1	8	.245	.318	.398	.717	61	-1.4	.311	102	1
23	Charlie Morton C. Morton	37	2021	ATL	31	55	5	7	1	0	0	1	0	0	31	0	0	62	8	1	7	0	0	0	.127	.127	.145	.273	-3	-10.1	.118	-33	-10.5
24	Rene Rivera R. Rivera	37	2021	TOT	25	69	8	16	3	0	2	9	4	2	29	0	0	78	25	5	3	0	0	4	.232	.293	.362	.656	8	-1.6	.288	83	-1.7
25	Joe Smith J. Smith	37	2021	TOT	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0