Grover Alexander had the most games pitched when pitching over 9 innings, with 63 games.

Interpreted as:

most regular-season games by a player with more than 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	Grover Alexander G. Alexander	63	700.2	38	21	.644	63	1.53	294	63	6	0	592		173	14	136	3	0		2,751	3	3.78	1.75	2.16	0.18	10.7	4.9	1.04	.251	2.22	7.60
2	Walter Johnson W. Johnson	60	689.0	31	26	.544	57	0.98	383	57	10	0	499		136	1	152	21	3		2,658	20	5.00	1.99	2.52	0.01	14.4	5.7	0.94	.237	1.78	6.52
3	Gaylord Perry G. Perry	40	434.2	13	11	.542	39	1.88	298	17	1	0	319	91	105	30	85	7	0	23	1,674	8	6.17	1.76	3.51	0.62	17.8	5.1	0.93	.230	2.17	6.61
4	Ted Lyons T. Lyons	39	430.0	19	19	.500	39	2.24	128	38	1	0	380	107	141	17	116	3	0		1,752	5	2.68	2.43	1.10	0.36	7.3	6.6	1.15	.244	2.95	7.95
5	Red Faber R. Faber	38	414.0	23	13	.639	36	2.09	165	34	1	0	358	96	111	9	83	13	2		1,651	9	3.59	1.80	1.99	0.20	10.0	5.0	1.07	.253	2.41	7.78
6	Eppa Rixey E. Rixey	35	402.2	19	16	.543	35	1.77	143	34	0	0	355	79	107	5	111	8	0		1,620	12	3.20	2.48	1.29	0.11	8.8	6.9	1.16	.259	2.39	7.93
7	Wilbur Cooper W. Cooper	33	371.0	20	9	.690	33	1.67	132	33	1	0	294	69	84	8	91	9	0		1,463	6	3.20	2.21	1.45	0.19	9.0	6.2	1.04	.234	2.04	7.13
8	Bucky Walters B. Walters	31	332.0	20	9	.690	31	1.73	112	26	2	0	272	64	74	14	112	2	0		1,338	3	3.04	3.04	1.00	0.38	8.4	8.4	1.16	.235	2.01	7.37
9	Red Ruffing R. Ruffing	28	314.2	11	15	.423	28	2.63	165	25	2	0	255	92	104	15	113	1	0		1,292	0	4.72	3.23	1.46	0.43	12.8	8.7	1.17	.240	2.97	7.29
10	Stan Coveleski S. Coveleski	28	304.0	14	13	.519	28	1.54	83	26	3	0	241	52	62	7	79	2	0		1,214	3	2.46	2.34	1.05	0.21	6.8	6.5	1.05	.224	1.84	7.13
11	Carl Hubbell C. Hubbell	27	298.2	10	15	.400	26	1.81	140	24	3	0	226	60	70	17	53	1	1		1,166	6	4.22	1.60	2.64	0.51	12.0	4.5	0.93	.219	2.11	6.81
12	Warren Spahn W. Spahn	26	292.0	11	12	.478	26	1.79	137	22	0	0	217	58	65	15	72	0	0	7	1,137	2	4.22	2.22	1.90	0.46	12.0	6.3	0.99	.221	2.00	6.69
13	Lefty Grove L. Grove	26	306.0	14	10	.583	26	2.06	141	24	1	0	257	70	80	9	102	3	0		1,265	3	4.15	3.00	1.38	0.26	11.1	8.1	1.17	.246	2.35	7.56
14	Eddie Cicotte E. Cicotte	26	282.0	10	15	.400	26	1.24	112	25	2	0	223		70	5	68	4	0		1,103	5	3.57	2.17	1.65	0.16	10.2	6.2	1.03	.239	2.23	7.12
15	Bob Gibson B. Gibson	25	265.2	9	11	.450	25	1.73	205	19	1	0	198	51	66	11	88	4	0	18	1,055	5	6.94	2.98	2.33	0.37	19.4	8.3	1.08	.250	2.24	6.71
16	Robin Roberts R. Roberts	25	275.1	12	9	.571	25	2.16	125	19	1	0	224	66	68	21	65	0	0	8	1,084	2	4.09	2.12	1.92	0.69	11.5	6.0	1.05	.233	2.22	7.32
17	Earl Whitehill E. Whitehill	25	276.0	11	11	.500	25	2.61	97	22	1	0	267	80	92	8	92	7	0		1,169	6	3.16	3.00	1.05	0.26	8.3	7.9	1.30	.268	3.00	8.71
18	Dolf Luque D. Luque	25	273.1	11	11	.500	25	1.71	119	21	2	0	208	52	64	4	64	3	0		1,073	2	3.92	2.11	1.86	0.13	11.1	6.0	1.00	.231	2.11	6.85
19	Jeff Pfeffer J. Pfeffer	25	290.1	8	12	.400	25	1.61	103	23	2	0	232	52	74	4	64	9	0		1,142	3	3.19	1.98	1.61	0.12	9.0	5.6	1.02	.237	2.29	7.19
20	Hippo Vaughn H. Vaughn	25	278.1	12	10	.545	25	1.26	128	24	2	0	237		75	4	61	8	0		1,106	7	4.14	1.97	2.10	0.13	11.6	5.5	1.07	.257	2.43	7.66
21	Larry French L. French	24	253.0	9	15	.375	24	1.96	81	22	1	0	217	55	78	10	64	2	0		1,029	0	2.88	2.28	1.27	0.36	7.9	6.2	1.11	.237	2.77	7.72
22	Burleigh Grimes B. Grimes	24	273.1	12	8	.600	23	2.01	97	19	0	0	255	61	86	7	89	1	1		1,141	2	3.19	2.93	1.09	0.23	8.5	7.8	1.26	.262	2.83	8.40
23	Fred Toney F. Toney	24	261.1	15	6	.714	24	1.41	101	23	2	0	187	41	56	2	53	6	0		1,003	4	3.48	1.83	1.91	0.07	10.1	5.3	0.92	.220	1.93	6.44
24	Hal Newhouser H. Newhouser	23	247.0	16	7	.696	23	1.89	127	23	2	0	182	52	57	9	79	0	0		998	4	4.63	2.88	1.61	0.33	12.7	7.9	1.06	.221	2.08	6.63
25	Paul Derringer P. Derringer	23	253.0	8	13	.381	23	1.92	86	20	2	0	223	54	69	11	47	6	0		1,014	5	3.06	1.67	1.83	0.39	8.5	4.6	1.07	.245	2.45	7.93