Walter Johnson had the most games pitched when pitching at least 9 innings, with 424 games.

Interpreted as:

most regular-season games by a player with 9+ ip

	NAME	G	IP	W	L	W%	GS	ERA	SO	CG	SHO	SV	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	Walter Johnson W. Johnson	424	3965.0	330	89	.788	421	1.13	2,413	419	106	0	2,894		862	48	824	117	3		15,375	94	5.48	1.87	2.93	0.11	15.7	5.4	0.94	.238	1.96	6.57
2	Grover Alexander G. Alexander	389	3634.2	333	49	.872	389	1.47	1,595	387	89	0	2,943		825	74	568	38	0		14,108	21	3.95	1.41	2.81	0.18	11.3	4.0	0.97	.242	2.04	7.29
3	Warren Spahn W. Spahn	362	3316.0	322	35	.902	362	1.66	1,682	355	63	0	2,465	610	674	174	770	17	0	25	12,894	34	4.57	2.09	2.18	0.47	13.0	6.0	0.98	.223	1.83	6.69
4	Ted Lyons T. Lyons	304	2815.0	237	65	.785	303	2.38	747	301	27	0	2,623	744	925	103	631	17	1		11,496	28	2.39	2.02	1.18	0.33	6.5	5.5	1.16	.252	2.96	8.39
5	Gaylord Perry G. Perry	296	2738.2	229	45	.836	295	1.52	1,843	265	53	0	1,875	462	544	132	565	38	0	50	10,447	48	6.06	1.86	3.26	0.43	17.6	5.4	0.89	.222	1.79	6.16
6	Red Ruffing R. Ruffing	286	2636.2	223	60	.788	286	2.33	1,279	282	43	0	2,134	682	765	111	782	20	0		10,605	21	4.37	2.67	1.64	0.38	12.1	7.4	1.11	.240	2.61	7.28
7	Robin Roberts R. Roberts	277	2543.1	236	32	.881	277	1.96	1,340	265	45	0	1,962	553	598	179	430	28	0	22	9,829	12	4.74	1.52	3.12	0.63	13.6	4.4	0.94	.227	2.12	6.94
8	Burleigh Grimes B. Grimes	276	2541.1	235	35	.870	274	2.18	967	267	35	0	2,283	615	776	67	662	50	2		10,369	39	3.42	2.34	1.46	0.24	9.3	6.4	1.16	.257	2.75	8.09
9	Lefty Grove L. Grove	267	2475.0	237	23	.912	266	2.09	1,425	259	33	0	2,132	574	671	78	613	21	1		10,025	19	5.18	2.23	2.32	0.28	14.2	6.1	1.11	.260	2.44	7.75
10	Early Wynn E. Wynn	260	2375.0	224	33	.872	259	1.52	1,214	254	49	0	1,649	402	468	100	742	27	1	6	9,318	18	4.60	2.81	1.64	0.38	13.0	8.0	1.01	.214	1.77	6.25
11	Bob Feller B. Feller	259	2363.1	219	33	.869	259	1.81	1,666	249	43	0	1,616	474	520	88	921	24	0	2	9,415	40	6.34	3.51	1.81	0.34	17.7	9.8	1.07	.228	1.98	6.15
12	Steve Carlton S. Carlton	245	2221.0	217	16	.931	245	1.49	1,816	230	55	0	1,477	367	412	92	622	23	0	35	8,533	69	7.36	2.52	2.92	0.37	21.3	7.3	0.95	.232	1.67	5.99
13	Red Faber R. Faber	245	2277.0	202	36	.849	243	1.88	861	237	29	0	1,894	476	610	43	590	48	2		9,159	25	3.40	2.33	1.46	0.17	9.4	6.4	1.09	.243	2.41	7.49
14	Eppa Rixey E. Rixey	245	2292.2	211	31	.872	245	1.58	716	241	37	0	1,911	403	522	25	464	30	0		9,020	39	2.81	1.82	1.54	0.10	7.9	5.1	1.04	.242	2.05	7.50
15	Bob Gibson B. Gibson	240	2200.2	197	31	.864	240	1.50	1,858	226	55	0	1,499	368	420	82	611	50	0	43	8,581	52	7.60	2.50	3.04	0.34	21.7	7.1	0.96	.237	1.72	6.13
16	Fergie Jenkins F. Jenkins	238	2161.2	208	20	.912	238	1.58	1,574	228	49	0	1,489	379	438	148	344	37	0	31	8,208	25	6.55	1.43	4.58	0.62	19.2	4.2	0.85	.220	1.82	6.20
17	Carl Hubbell C. Hubbell	235	2170.2	211	22	.906	234	1.75	1,035	232	35	0	1,762	423	498	104	349	30	1		8,540	26	4.29	1.45	2.97	0.43	12.1	4.1	0.97	.236	2.06	7.31
18	Wilbur Cooper W. Cooper	235	2189.0	181	47	.794	235	1.87	785	232	32	0	1,856	455	550	43	455	50	0		8,682	23	3.23	1.87	1.73	0.18	9.0	5.2	1.06	.247	2.26	7.63
19	Juan Marichal J. Marichal	232	2118.2	206	17	.924	232	1.55	1,461	223	52	0	1,487	366	423	131	347	18	0	31	8,091	24	6.21	1.47	4.21	0.56	18.1	4.3	0.87	.221	1.80	6.32
20	Tom Seaver T. Seaver	228	2076.2	189	18	.913	228	1.23	1,662	203	61	0	1,259	283	308	90	452	16	0	32	7,786	30	7.20	1.96	3.68	0.39	21.3	5.8	0.82	.210	1.33	5.46
21	Bert Blyleven B. Blyleven	219	1991.1	168	31	.844	219	1.45	1,559	197	60	0	1,337	321	365	81	426	45	0	14	7,582	33	7.05	1.93	3.66	0.37	20.6	5.6	0.89	.230	1.65	6.04
22	Sad Sam Jones S. Sam Jones	218	1994.1	176	39	.819	218	2.01	647	213	36	0	1,654	446	541	51	606	24	0		8,049	26	2.92	2.73	1.07	0.23	8.0	7.5	1.13	.239	2.44	7.46
23	Herb Pennock H. Pennock	217	1993.0	185	29	.864	216	2.16	667	214	35	0	1,816		566	54	397	13	1		7,993	26	3.01	1.79	1.68	0.24	8.3	5.0	1.11	.257	2.56	8.20
24	Phil Niekro P. Niekro	214	1948.2	181	20	.900	214	1.55	1,247	199	45	0	1,340	335	400	102	468	36	0	15	7,513	55	5.76	2.16	2.66	0.47	16.6	6.2	0.93	.219	1.85	6.19
25	Bucky Walters B. Walters	212	1961.0	176	33	.842	212	1.70	715	205	42	0	1,523	371	444	69	577	22	0		7,792	33	3.28	2.65	1.24	0.32	9.2	7.4	1.07	.227	2.04	6.99