most wins by a starting pitcher at the age of 43

Phil Niekro has won the most career games by a 43-year-old starting pitcher, with 17 wins.

Interpreted as:

most regular-season wins by a starting pitcher at the age of 43

	NAME	W	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	Phil Niekro P. Niekro	17	4	.810	35	35	3.61	144	4	2	0	234.1	225	94	106	23	73	3	0	1	969	4	5.53	2.80	1.97	0.88	14.9	7.5	1.27	.278	4.07	8.64
2	Bartolo Colon B. Colon	13	9	.591	33	33	4.19	119	0	0	0	184.2	204	86	96	26	32	3	0	2	774	0	5.80	1.56	3.72	1.27	15.4	4.1	1.28	.300	4.68	9.94
3	Nolan Ryan N. Ryan	13	9	.591	30	30	3.44	232	5	2	0	204.0	137	78	86	18	74	7	0	2	818	9	10.24	3.26	3.14	0.79	28.4	9.0	1.03	.244	3.79	6.04
4	Jamie Moyer J. Moyer	11	14	.440	33	33	4.30	108	2	1	0	211.1	228	101	110	33	51	5	0	5	894	3	4.60	2.17	2.12	1.41	12.1	5.7	1.32	.280	4.68	9.71
5	Gaylord Perry G. Perry	10	15	.400	34	34	4.53	121	6	0	0	226.1	264	114	124	27	60	3	0	4	971	12	4.81	2.39	2.02	1.07	12.5	6.2	1.43	.312	4.93	10.50
6	Kenny Rogers K. Rogers	9	13	.409	30	30	5.70	82	0	0	0	173.2	212	110	118	22	71	9	0	3	782	4	4.25	3.68	1.15	1.14	10.5	9.1	1.63	.318	6.12	10.99
7	Charlie Hough C. Hough	9	10	.474	29	29	3.95	102	4	1	0	193.2	163	85	94	21	89	11	0	0	833	5	4.74	4.14	1.15	0.98	12.2	10.7	1.30	.233	4.37	7.57
8	Rich Hill R. Hill	7	14	.333	27	27	5.57	120	0	0	0	135.2	155	84	91	23	53	6	0	0	613	2	7.96	3.52	2.26	1.53	19.6	8.6	1.53	.321	6.04	10.28
9	Warren Spahn W. Spahn	7	12	.368	25	25	5.32	72	5	1	0	154.0	181	91	99	18	46	2	0	3	672	5	4.21	2.69	1.57	1.05	10.7	6.8	1.47	.305	5.79	10.58
10	Cy Young C. Young	7	10	.412	20	20		57	14	1	0	162.0	149		60	0	27	4	0		628	7	3.17	1.50	2.11	0.00	9.1	4.3	1.09	.276	3.33	8.28
11	Tommy John T. John	6	4	.600	15	15	3.08	37	1	0	0	87.2	94	30	33	6	17	2	0	2	360	4	3.80	1.75	2.18	0.62	10.3	4.7	1.27	.295	3.39	9.65
12	Jack Quinn J. Quinn	6	9	.400	18	18	4.65	33	3	0	0	110.1	133	57	68	8	23	4	0		484	0	2.69	1.88	1.43	0.65	6.8	4.8	1.41	.300	5.55	10.85
13	Randy Johnson R. Johnson	5	4	.556	13	13	4.72	91	0	0	0	74.1	76	39	41	9	17	5	0	3	315	1	11.02	2.06	5.35	1.09	28.9	5.4	1.25	.347	4.96	9.20
14	Roger Clemens R. Clemens	5	8	.385	18	18	2.54	90	1	0	0	109.2	89	31	38	7	31	1	0	3	441	3	7.39	2.54	2.90	0.57	20.4	7.0	1.09	.263	3.12	7.30
15	David Wells D. Wells	4	6	.400	20	20	4.41	61	0	0	0	116.1	143	57	61	13	22	2	0	1	495	0	4.72	1.70	2.77	1.01	12.3	4.4	1.42	.327	4.72	11.06
16	Sad Sam Jones S. Sam Jones	4	4	.500	9	9	3.45	20	4	0	0	62.2	72	24	31	1	23	0	0		276	1	2.87	3.30	0.87	0.14	7.2	8.3	1.52	.306	4.45	10.34
17	Tim Wakefield T. Wakefield	3	10	.231	20	20	5.61	70	0	0	0	120.1	133	75	82	17	41	5	0	3	536	9	5.24	3.07	1.71	1.27	13.1	7.6	1.45	.288	6.13	9.95
18	Don Sutton D. Sutton	3	6	.333	16	16	3.92	44	0	0	0	87.1	91	38	44	7	30	1	0	6	380	2	4.53	3.09	1.47	0.72	11.6	7.9	1.39	.282	4.53	9.38
19	Johnny Niggeling J. Niggeling	2	4	.333	7	7	2.77	22	3	0	0	55.1	48	17	19	2	17	1	0		232	3	3.58	2.77	1.29	0.33	9.5	7.3	1.17	.242	3.09	7.81
20	Jesse Haines J. Haines	2	6	.250	9	9	5.34	14	3	0	0	55.2	71	33	33	4	15	0	0		246	1	2.26	2.43	0.93	0.65	5.7	6.1	1.54	.315	5.34	11.48
21	Babe Adams B. Adams	2	3	.400	7	7	6.10	6	2	0	0	41.1	59	28	31	3	5	1	0		186	0	1.31	1.09	1.20	0.65	3.2	2.7	1.55	.327	6.75	12.85
22	Dennis Martinez D. Martinez	1	1	.500	3	3	1.89	10	1	1	0	19.0	24	4	8	1	3	0	0	0	78	0	4.74	1.42	3.33	0.47	12.8	3.8	1.42	.359	3.79	11.37
23	Jim Kaat J. Kaat	1	0	1.000	2	2	2.00	5	0	0	0	9.0	9	2	2	1	1	0	0	0	35	0	5.00	1.00	5.00	1.00	14.3	2.9	1.11	.286	2.00	9.00
24	Early Wynn E. Wynn	1	1	.500	5	5	3.26	17	1	0	0	30.1	33	11	11	2	6	0	0	0	124	0	5.04	1.78	2.83	0.59	13.7	4.8	1.29	.313	3.26	9.79
25	Connie Marrero C. Marrero	1	4	.200	8	8	5.83	15	1	0	0	41.2	52	27	28	9	13	0	0		186	0	3.24	2.81	1.15	1.94	8.1	7.0	1.56	.289	6.05	11.23