most games started by an mlb pitcher before turning 31 since 1940

Since 1940, Phil Niekro has started the most games by a pitcher 31 or older, with 626 starts.

Interpreted as:

most regular-season games started by an MLB pitcher before turning 31 years old since 1940

	NAME	GS	G	W	L	W%	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	626	662	264	234	.530	3.51	2,806	199	35	9	4516.0	4,281	1,759	2,023	426	1,596	100	23	65	19,074	162	5.59	3.18	1.76	0.85	14.7	8.4	1.30	.273	4.03	8.53
2	Jamie Moyer J. Moyer	502	530	223	146	.604	4.23	1,916	23	7	0	3222.0	3,311	1,513	1,619	432	835	121	6	46	13,651	34	5.35	2.33	2.29	1.21	14.0	6.1	1.29	.278	4.52	9.25
3	Gaylord Perry G. Perry	489	492	221	182	.548	3.16	2,327	218	39	1	3700.1	3,449	1,300	1,497	284	957	71	3	89	15,161	99	5.66	2.33	2.43	0.69	15.3	6.3	1.19	.275	3.64	8.39
4	Nolan Ryan N. Ryan	476	476	183	160	.534	3.29	3,288	84	27	0	3152.0	2,386	1,151	1,311	199	1,411	87	0	46	13,116	174	9.39	4.03	2.33	0.57	25.1	10.8	1.20	.269	3.74	6.81
5	Warren Spahn W. Spahn	462	526	255	172	.597	3.10	1,762	258	41	22	3636.0	3,388	1,254	1,387	324	918	33	50		14,896	46	4.36	2.27	1.92	0.80	11.8	6.2	1.18	.258	3.43	8.39
6	Charlie Hough C. Hough	439	518	177	178	.499	3.87	1,927	107	13	2	3185.1	2,831	1,371	1,564	335	1,335	135	33	27	13,554	146	5.44	3.77	1.44	0.95	14.2	9.8	1.31	.254	4.42	8.00
7	Randy Johnson R. Johnson	417	430	222	104	.681	3.12	3,545	65	25	1	2890.0	2,380	1,001	1,130	305	807	130	5	29	11,751	57	11.04	2.51	4.39	0.95	30.2	6.9	1.10	.298	3.52	7.41
8	Roger Clemens R. Clemens	416	417	193	105	.648	3.36	2,678	27	11	0	2752.2	2,369	1,027	1,126	226	990	101	0	25	11,468	94	8.76	3.24	2.71	0.74	23.4	8.6	1.22	.287	3.68	7.75
9	Greg Maddux G. Maddux	405	405	189	122	.608	3.43	1,711	34	14	0	2621.2	2,607	999	1,108	234	408	74	0	82	10,702	29	5.87	1.40	4.19	0.80	16.0	3.8	1.15	.287	3.80	8.95
10	Don Sutton D. Sutton	403	407	169	130	.565	3.48	1,661	68	18	2	2738.0	2,522	1,059	1,163	285	690	35	3	43	11,266	47	5.46	2.27	2.41	0.94	14.7	6.1	1.17	.260	3.82	8.29
11	Tommy John T. John	394	417	171	127	.574	3.62	1,009	93	19	1	2629.0	2,865	1,058	1,201	161	651	49	13	42	11,092	99	3.45	2.23	1.55	0.55	9.1	5.9	1.34	.293	4.11	9.81
12	Early Wynn E. Wynn	392	442	199	142	.584	3.35	1,746	177	38	13	2919.0	2,581	1,088	1,210	246	1,157	44	40		12,263	34	5.38	3.57	1.51	0.76	14.2	9.4	1.28	.257	3.73	7.96
13	David Wells D. Wells	387	388	180	109	.623	4.21	1,601	52	12	0	2546.2	2,772	1,191	1,278	306	471	62	0	32	10,695	51	5.66	1.66	3.40	1.08	15.0	4.4	1.27	.299	4.52	9.80
14	Tom Glavine T. Glavine	384	384	166	111	.599	3.60	1,395	22	12	0	2457.0	2,427	983	1,058	229	836	40	0	84	10,358	18	5.11	3.06	1.67	0.84	13.5	8.1	1.33	.280	3.88	8.89
15	Steve Carlton S. Carlton	380	394	181	125	.592	3.32	2,220	109	24	1	2766.1	2,487	1,020	1,170	234	944	25	6	77	11,472	100	7.22	3.07	2.35	0.76	19.4	8.2	1.24	.280	3.81	8.09
16	Kenny Rogers K. Rogers	374	386	149	105	.587	4.43	1,288	22	6	0	2359.1	2,532	1,161	1,271	242	805	107	5	20	10,214	44	4.91	3.07	1.60	0.92	12.6	7.9	1.41	.295	4.85	9.66
17	Tim Wakefield T. Wakefield	353	510	151	135	.528	4.50	1,692	11	0	22	2475.2	2,416	1,237	1,387	328	880	146	75	26	10,676	107	6.15	3.20	1.92	1.19	15.8	8.2	1.33	.274	5.04	8.78
18	Joe Niekro J. Niekro	353	417	157	137	.534	3.47	1,278	82	20	5	2478.2	2,297	957	1,108	171	922	50	22	32	10,455	151	4.64	3.35	1.39	0.62	12.2	8.8	1.30	.265	4.02	8.34
19	Jerry Koosman J. Koosman	346	411	143	141	.504	3.62	1,670	82	15	16	2508.2	2,467	1,008	1,126	191	792	46	37	68	10,535	48	5.99	2.84	2.11	0.69	15.9	7.5	1.30	.290	4.04	8.85
20	Tom Seaver T. Seaver	333	337	143	109	.567	3.28	1,541	83	27	0	2335.1	2,031	852	941	207	734	32	1	64	9,609	70	5.94	2.83	2.10	0.80	16.0	7.6	1.18	.257	3.63	7.83
21	Bartolo Colon B. Colon	332	343	143	123	.538	4.27	1,374	10	6	0	2019.0	2,212	958	1,046	280	406	36	2	22	8,548	11	6.12	1.81	3.38	1.25	16.1	4.7	1.30	.299	4.66	9.86
22	Dennis Martinez D. Martinez	319	373	137	100	.578	3.33	1,291	53	20	3	2224.2	2,075	823	936	185	582	83	14	47	9,210	33	5.22	2.35	2.22	0.75	14.0	6.3	1.19	.267	3.79	8.39
23	Fergie Jenkins F. Jenkins	310	322	135	117	.536	3.56	1,372	118	22	0	2197.0	2,127	869	968	249	508	43	7	45	9,081	30	5.62	2.08	2.70	1.02	15.1	5.6	1.20	.272	3.97	8.71
24	Mike Cuellar M. Cuellar	308	318	151	100	.602	3.17	1,146	144	32	1	2200.2	1,967	774	875	184	649	9	6	41	8,980	39	4.69	2.65	1.77	0.75	12.8	7.2	1.19	.255	3.58	8.04
25	Jim Kaat J. Kaat	307	542	141	116	.549	3.61	1,024	78	15	12	2301.2	2,457	922	1,046	190	518	39	86	75	9,673	46	4.00	2.03	1.98	0.74	10.6	5.4	1.29	.287	4.09	9.61