Leon Cadore and Joe Oeschger are tied for pitching the most innings in a day, with 26 innings on May 1, 1920.

Interpreted as:

most ip by a player in a day

	NAME	IP	DAY	W	L	W%	GS	ERA	SO	CG	SHO	SV	H	ER	R	HR	BB	HBP	GF	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Leon Cadore L. Cadore	26.0	5/1/1920	0	0		1	0.35	7	1	0	0	15	1	1	0	5	0	0	96	0	2.42	1.73	1.40	0.00	7.3	5.2	0.77	.179	0.35	5.19
2	Joe Oeschger J. Oeschger	26.0	5/1/1920	0	0		1	0.35	7	1	0	0	9	1	1	0	4	0	0	90	1	2.42	1.38	1.75	0.00	7.8	4.4	0.50	.114	0.35	3.12
3	Jack Coombs J. Coombs	24.0	9/1/1906	1	0	1.000	1		18	1	0	0	15		1	0	6	1	0	89	0	6.75	2.25	3.00	0.00	20.2	6.7	0.88	.234	0.38	5.63
4	Joe Harris J. Harris	24.0	9/1/1906	0	1	.000	1		14	1	0	0	16		4	0	2	1	0	87	0	5.25	0.75	7.00	0.00	16.1	2.3	0.75	.229	1.50	6.00
5	Bob Smith B. Smith	22.0	5/17/1927	0	1	.000	1	1.23	5	1	0	0	20	3	4	0	9	0	0	89	0	2.05	3.68	0.56	0.00	5.6	10.1	1.32	.267	1.64	8.18
6	Ted Lyons T. Lyons	21.0	5/24/1929	0	1	.000	1	2.57	4	1	0	0	24	6	6	0	2	0	0	85	0	1.71	0.86	2.00	0.00	4.7	2.4	1.24	.304	2.57	10.29
7	Art Nehf A. Nehf	21.0	8/1/1918	0	1	.000	1	0.86	8	1	0	0	12	2	2	0	5	0	0	77	0	3.43	2.14	1.60	0.00	10.4	6.5	0.81	.188	0.86	5.14
8	Lefty Tyler L. Tyler	21.0	7/17/1918	1	0	1.000	1	0.00	8	1	0	0	13	0	1	0	1	0	0	77	0	3.43	0.43	8.00	0.00	10.4	1.3	0.67	.191	0.43	5.57
9	Babe Adams B. Adams	21.0	7/17/1914	0	1	.000	1	1.29	6	1	0	0	12	3	3	1	0	0	0	75	0	2.57	0.00		0.43	8.0	0.0	0.57	.162	1.29	5.14
10	Rube Marquard R. Marquard	21.0	7/17/1914	1	0	1.000	1	0.43	2	1	0	0	15	1	1	0	2	1	0	79	0	0.86	0.86	1.00	0.00	2.5	2.5	0.81	.203	0.43	6.43
11	Rube Waddell R. Waddell	20.2	7/4/1905	2	0	1.000	1		11	1	0	0	15		2	0	4	0	1		0	4.79	1.74	2.75	0.00		5.1	0.92	.234	0.87	6.53
12	George Uhle G. Uhle	20.0	5/24/1929	1	0	1.000	1	2.25	4	0	0	0	17	5	5	0	3	0	0	79	1	1.80	1.35	1.33	0.00	5.1	3.8	1.00	.236	2.25	7.65
13	Burleigh Grimes B. Grimes	20.0	4/30/1919	0	0		1	4.05	8	1	0	0	15	9	9	0	7	0	0	84	0	3.60	3.15	1.14	0.00	9.5	8.3	1.10	.217	4.05	6.75
14	Joe Oeschger J. Oeschger	20.0	4/30/1919	0	0		1	3.60	2	1	0	0	24	8	9	1	4	0	0	82	0	0.90	1.80	0.50	0.45	2.4	4.9	1.40	.307	4.05	10.80
15	Milt Watson M. Watson	20.0	7/17/1918	0	1	.000	1	0.90	5	1	0	0	19	2	2	0	4	1	0	82	0	2.25	1.80	1.25	0.00	6.1	4.9	1.15	.264	0.90	8.55
16	Ed Reulbach E. Reulbach	20.0	8/24/1905	1	0	1.000	1		7	1	0	0	13		1	0	4	1	0	70	0	3.15	1.80	1.75	0.00	10.0	5.7	0.85	.224	0.45	5.85
17	Tully Sparks T. Sparks	20.0	8/24/1905	0	1	.000	1		6	1	0	0	19		2	0	1	3	0	72	0	2.70	0.45	6.00	0.00	8.3	1.4	1.00	.306	0.90	8.55
18	Cy Young C. Young	20.0	7/4/1905	0	1	.000	1		9	1	0	0	12		4	1	0	1	0	75	0	4.05	0.00		0.45	12.0	0.0	0.60	.172	1.80	5.40
19	Les Mueller L. Mueller	19.2	7/21/1945	0	0		1	0.00	6	0	0	0	13	0	1	0	5	0	0	74	0	2.75	2.29	1.20	0.00	8.1	6.8	0.92	.206	0.46	5.95
20	Dixie Davis D. Davis	19.0	8/9/1921	1	0	1.000	1	2.37	8	1	0	0	13	5	6	0	5	0	0	74	0	3.79	2.37	1.60	0.00	10.8	6.8	0.95	.213	2.84	6.16
21	Dana Fillingim D. Fillingim	19.0	5/3/1920	1	0	1.000	1	0.00	4	1	0	0	12	0	1	0	4	0	0	72	0	1.89	1.89	1.00	0.00	5.6	5.6	0.84	.188	0.47	5.68
22	Stan Coveleski S. Coveleski	19.0	5/24/1918	1	0	1.000	1	0.95	4	1	0	0	12	2	2	1	6	0	0	73	0	1.89	2.84	0.67	0.47	5.5	8.2	0.95	.177	0.95	5.68
23	Eddie Plank E. Plank	19.0	9/27/1912	0	1	.000	1		5	1	0	0	13		5	0	6	1	0	75	1	2.37	2.84	0.83	0.00	6.7	8.0	1.00	.206	2.37	6.16
24	Otto Hess O. Hess	19.0	7/31/1912	0	1	.000	1	2.37	4	1	0	0	15	5	7	0	8	0	0	77	0	1.89	3.79	0.50	0.00	5.2	10.4	1.21	.231	3.32	7.11
25	Ed Summers E. Summers	19.0	9/25/1908	2	0	1.000	2		7	2	1	0	8		2	0	3	0	0	68	0	3.32	1.42	2.33	0.00	10.3	4.4	0.58	.138	0.95	3.79