Jamie Moyer and Jack Quinn are tied for the oldest in wins in a season. They were 49 years old.

Interpreted as:

oldest player to record a win in a regular season

	NAME	AGE	W	SEASON	TM	L	W%	G	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	Jamie Moyer J. Moyer	49	2	2012	COL	0	1.000	2	2	0.68	6	0	0	0	13.1	12	1	3	0	4	0	0	0	54	0	4.05	2.70	1.50	0.00	11.1	7.4	1.20	.273	2.03	8.10
2	Jack Quinn J. Quinn	49	3	1932	BKN	0	1.000	3	0	0.00	4	0	0	0	9.0	5	0	0	0	2	0	3		34	0	4.00	2.00	2.00	0.00	11.8	5.9	0.78	.179	0.00	5.00
3	Phil Niekro P. Niekro	48	7	1987	CLE	0	1.000	7	7	2.82	15	0	0	0	44.2	45	14	15	1	18	2	0	0	196	3	3.02	3.63	0.83	0.20	7.7	9.2	1.41	.275	3.02	9.07
4	Jack Quinn J. Quinn	48	5	1931	BKN	0	1.000	5	0	0.00	6	0	0	0	11.1	5	0	1	0	4	0	5		43	0	4.76	3.18	1.50	0.00	14.0	9.3	0.79	.152	0.79	3.97
5	Jamie Moyer J. Moyer	47	9	2010	PHI	0	1.000	9	9	2.89	32	2	1	0	65.1	44	21	24	11	9	2	0	0	250	0	4.41	1.24	3.56	1.52	12.8	3.6	0.81	.168	3.31	6.06
6	Phil Niekro P. Niekro	47	11	1986	CLE	0	1.000	11	9	1.82	31	3	0	0	74.1	55	15	19	5	21	3	1	0	294	1	3.75	2.54	1.48	0.61	10.5	7.1	1.02	.214	2.30	6.66
7	Jack Quinn J. Quinn	47	9	1930	PHA	0	1.000	9	1	1.91	13	0	0	0	33.0	23	7	7	0	5	0	5		124	0	3.55	1.36	2.60	0.00	10.5	4.0	0.85	.217	1.91	6.27
8	Jamie Moyer J. Moyer	46	12	2009	PHI	0	1.000	12	10	2.94	47	0	0	0	70.1	61	23	23	9	16	3	1	0	289	0	6.01	2.05	2.94	1.15	16.3	5.5	1.09	.243	2.94	7.81
9	Jesse Orosco J. Orosco	46	2	2003	TOT	0	1.000	2	0	9.00	1	0	0	0	1.0	2	1	1	0	0	0	0	0	5	0	9.00	0.00		0.00	20.0	0.0	2.00	.500	9.00	18.00
10	Charlie Hough C. Hough	46	5	1994	FLA	0	1.000	5	5	2.27	25	1	1	0	35.2	28	9	12	3	8	2	0	0	143	1	6.31	2.02	3.13	0.76	17.5	5.6	1.01	.238	3.03	7.07
11	Nolan Ryan N. Ryan	46	5	1993	TEX	0	1.000	5	5	1.71	21	0	0	0	31.2	17	6	9	0	10	1	0	0	120	2	5.97	2.84	2.10	0.00	17.5	8.3	0.85	.193	2.56	4.83
12	Tommy John T. John	46	2	1989	NYY	0	1.000	2	2	2.40	8	0	0	0	15.0	17	4	4	0	4	0	0	0	63	0	4.80	2.40	2.00	0.00	12.7	6.3	1.40	.333	2.40	10.20
13	Phil Niekro P. Niekro	46	16	1985	NYY	0	1.000	16	16	1.66	87	3	1	0	119.0	76	22	24	6	60	1	0	0	474	2	6.58	4.54	1.45	0.45	18.4	12.7	1.14	.219	1.82	5.75
14	Hoyt Wilhelm H. Wilhelm	46	6	1970	ATL	0	1.000	6	0	0.00	12	0	0	0	16.1	10	0	0	0	4	0	6	0	60	0	6.61	2.20	3.00	0.00	20.0	6.7	0.86	.227	0.00	5.51
15	Satchel Paige S. Paige	46	3	1953	SLA	0	1.000	3	1	2.19	6	0	0	0	12.1	5	3	3	1	2	0	2		42	1	4.38	1.46	3.00	0.73	14.3	4.8	0.57	.121	2.19	3.65
16	Hod Lisenbee H. Lisenbee	46	1	1945	CIN	0	1.000	1	0	0.00	1	0	0	0	2.0	0	0	0	0	1	0	1		6	0	4.50	4.50	1.00	0.00	16.7	16.7	0.50	.000	0.00	0.00
17	Jack Quinn J. Quinn	46	11	1929	PHA	0	1.000	11	7	2.66	18	5	0	0	74.1	72	22	23	3	14	0	2		297	0	2.18	1.70	1.29	0.36	6.1	4.7	1.16	.263	2.78	8.72
18	Bartolo Colon B. Colon	45	7	2018	TEX	0	1.000	7	7	3.80	13	0	0	0	42.2	44	18	18	6	6	0	0	0	176	1	2.74	1.27	2.17	1.27	7.4	3.4	1.17	.252	3.80	9.28
19	Randy Johnson R. Johnson	45	8	2009	SFG	0	1.000	8	8	1.97	44	0	0	0	50.1	32	11	12	6	10	1	0	0	189	2	7.87	1.79	4.40	1.07	23.3	5.3	0.83	.203	2.15	5.72
20	Jamie Moyer J. Moyer	45	16	2008	PHI	0	1.000	16	16	2.52	56	0	0	0	103.2	85	29	29	9	24	5	0	1	412	1	4.86	2.08	2.33	0.78	13.6	5.8	1.05	.239	2.52	7.38
21	Jesse Orosco J. Orosco	45	1	2002	LAD	0	1.000	1	0	0.00	0	0	0	0	0.1	0	0	0	0	0	0	0	0	1	0	0.00	0.00		0.00	0.0	0.0	0.00	.000	0.00	0.00
22	Charlie Hough C. Hough	45	9	1993	FLA	0	1.000	9	9	2.25	35	0	0	0	64.0	55	16	16	6	15	0	0	0	254	6	4.92	2.11	2.33	0.84	13.8	5.9	1.09	.247	2.25	7.73
23	Nolan Ryan N. Ryan	45	5	1992	TEX	0	1.000	5	5	1.70	37	1	0	0	37.0	21	7	8	2	14	2	0	0	146	1	9.00	3.41	2.64	0.49	25.3	9.6	0.95	.209	1.95	5.11
24	Tommy John T. John	45	9	1988	NYY	0	1.000	9	9	1.86	25	0	0	0	63.0	65	13	14	3	11	0	0	0	250	1	3.57	1.57	2.27	0.43	10.0	4.4	1.21	.294	2.00	9.29
25	Phil Niekro P. Niekro	45	16	1984	NYY	0	1.000	16	16	1.36	80	2	1	0	119.1	97	18	22	6	34	0	0	0	471	0	6.03	2.56	2.35	0.45	17.0	7.2	1.10	.259	1.66	7.32