Jim Kaat, Phil Niekro and Gaylord Perry were tied for the oldest in 1983. They were 44 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	Jim Kaat J. Kaat	44	1983	STL	24	4	0	0	0	0	0	0	0	0	2	0	0	5	0	0	1	0	0	0	.000	.000	.000	.000	-1	-1.2	.000	-116	-1.2
2	Phil Niekro P. Niekro	44	1983	ATL	34	65	3	12	2	0	0	5	1	0	12	0	0	73	14	2	6	1	0	7	.185	.194	.215	.409	1	-7.6	.184	2	-8.3
3	Gaylord Perry G. Perry	44	1983	TOT
4	Woodie Fryman W. Fryman	43	1983	MON
5	Carl Yastrzemski C. Yastrzemski	43	1983	BOS	119	380	38	101	24	0	10	56	54	2	29	0	0	437	155	34	0	1	11	13	.266	.359	.408	.767	56	7.1	.340	105	2.5
6	Pete Rose P. Rose	42	1983	PHI	151	493	52	121	14	3	0	45	52	2	28	7	7	555	141	17	1	7	5	11	.245	.316	.286	.602	45	-18.2	.277	69	-20
7	Bert Campaneris B. Campaneris	41	1983	NYY	60	143	19	46	5	0	0	11	8	0	9	6	7	155	51	5	3	1	0	4	.322	.355	.357	.712	18	0.6	.324	103	0.6
8	Tony Perez T. Perez	41	1983	PHI	91	253	18	61	11	2	6	43	28	1	57	1	0	285	94	19	0	3	1	9	.241	.316	.372	.687	30	-2	.310	91	-2.9
9	Fergie Jenkins F. Jenkins	40	1983	CHC	33	53	3	13	2	1	0	5	1	0	8	0	0	59	17	3	5	0	0	0	.245	.259	.321	.580	4	-2.7	.259	51	-3.3
10	Tommy John T. John	40	1983	CAL
11	Jerry Koosman J. Koosman	40	1983	CWS
12	Ron Reed R. Reed	40	1983	PHI	61	6	0	1	0	0	0	0	0	0	2	0	0	7	1	0	1	0	0	0	.167	.167	.167	.333	0	-0.9	.151	-16	-0.9
13	Bill Robinson B. Robinson	40	1983	PHI	10	7	0	1	0	0	0	2	1	0	4	0	0	8	1	0	0	0	0	1	.143	.250	.143	.393	0	-0.7	.202	18	-0.8
14	Tom Burgmeier T. Burgmeier	39	1983	OAK	4	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
15	Joe Morgan J. Morgan	39	1983	PHI	123	404	72	93	20	1	16	59	89	4	54	18	2	504	163	37	1	6	1	13	.230	.370	.403	.773	70	13.3	.353	120	11.7
16	Lou Piniella L. Piniella	39	1983	NYY	53	148	19	43	9	1	2	16	11	1	12	1	1	160	60	12	0	0	3	4	.291	.344	.405	.749	20	1.5	.331	108	1.5
17	Rusty Staub R. Staub	39	1983	NYM	104	115	5	34	6	0	3	28	14	1	10	0	0	132	49	9	0	2	3	4	.296	.371	.426	.797	18	3.3	.351	121	3.2
18	Jim Bibby J. Bibby	38	1983	PIT	29	18	0	2	0	0	0	0	0	0	6	0	0	20	2	0	2	0	0	0	.111	.111	.111	.222	-1	-3.4	.101	-51	-3.5
19	Steve Carlton S. Carlton	38	1983	PHI	37	97	9	19	5	0	0	1	2	0	20	0	0	105	24	5	6	0	0	2	.196	.212	.247	.460	3	-9.1	.208	22	-9.4
20	Davey Lopes D. Lopes	38	1983	OAK	147	494	64	137	13	4	17	67	51	2	61	22	4	561	209	34	4	10	7	9	.277	.341	.423	.764	71	7.8	.337	113	8.3
21	Rudy May R. May	38	1983	NYY
22	Tug McGraw T. McGraw	38	1983	PHI	34	3	0	1	0	0	0	0	0	0	0	0	0	5	1	0	2	0	0	0	.333	.333	.333	.667	0	-0.1	.302	86	-0.1
23	Jose Morales J. Morales	38	1983	LAD	47	53	4	15	3	0	3	8	1	0	11	0	0	54	27	6	0	0	0	2	.283	.296	.509	.806	8	1.5	.354	125	1.5
24	Graig Nettles G. Nettles	38	1983	NYY	129	462	56	123	17	3	20	75	51	3	65	0	1	519	206	40	0	3	2	9	.266	.341	.446	.787	71	12.8	.351	121	12.7
25	Joe Niekro J. Niekro	38	1983	HOU	38	85	1	8	2	0	0	2	0	1	22	0	0	98	10	2	12	0	0	1	.094	.105	.118	.222	-5	-16.5	.102	-42	-16.1