47 pitchers are tied for winning the most games in a day, with 2 wins. The first three are Brian Duensing on August 9, 2013, Luis Vizcaino on July 21, 2007 and Terry Adams on September 21, 2002.

Interpreted as:

most wins by a player in a day

	NAME	W	DAY	L	W%	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	Brian Duensing B. Duensing	2	8/9/2013	0	1.000	0	0.00	1	0	0	0	1.1	0	0	0	0	0	0	0	0	4	0	6.75	0.00		0.00	25.0	0.0	0.00	.000	0.00	0.00
2	Luis Vizcaino L. Vizcaino	2	7/21/2007	0	1.000	0	0.00	2	0	0	0	2.1	1	0	0	0	0	0	0	0	8	0	7.71	0.00		0.00	25.0	0.0	0.43	.167	0.00	3.86
3	Terry Adams T. Adams	2	9/21/2002	0	1.000	0	3.00	1	0	0	0	3.0	2	1	1	1	1	0	0	0	12	0	3.00	3.00	1.00	3.00	8.3	8.3	1.00	.111	3.00	6.00
4	Cory Bailey C. Bailey	2	5/26/2002	0	1.000	0	0.00	1	0	0	0	1.2	2	0	0	0	2	0	1	1	9	0	5.40	10.80	0.50	0.00	11.1	22.2	2.40	.333	0.00	10.80
5	David Wells D. Wells	2	7/17/1989	0	1.000	0	0.00	4	0	0	0	4.2	3	0	0	0	2	0	0	1	20	0	7.71	3.86	2.00	0.00	20.0	10.0	1.07	.214	0.00	5.79
6	Frank Williams F. Williams	2	8/24/1984	0	1.000	0	5.40	2	0	0	0	1.2	1	1	1	0	2	0	0	0	7	0	10.80	10.80	1.00	0.00	28.6	28.6	1.80	.333	5.40	5.40
7	Jesse Orosco J. Orosco	2	7/31/1983	0	1.000	0	0.00	4	0	0	0	5.0	3	0	0	0	2	0	2	1	20	0	7.20	3.60	2.00	0.00	20.0	10.0	1.00	.214	0.00	5.40
8	Jeff Reardon J. Reardon	2	8/26/1982	0	1.000	0	0.00	3	0	0	0	3.0	5	0	0	0	0	0	1	0	14	0	9.00	0.00		0.00	21.4	0.0	1.67	.455	0.00	15.00
9	Mark Littell M. Littell	2	7/1/1979	0	1.000	0	0.00	4	0	0	0	3.0	2	0	0	0	0	0	2	0	10	0	12.00	0.00		0.00	40.0	0.0	0.67	.333	0.00	6.00
10	Kent Tekulve K. Tekulve	2	9/29/1978	0	1.000	0	0.00	3	0	0	0	3.1	2	0	0	0	1	0	2	0	13	0	8.10	2.70	3.00	0.00	23.1	7.7	0.90	.222	0.00	5.40
11	Ken Forsch K. Forsch	2	7/14/1978	0	1.000	0	0.00	3	0	0	0	4.0	1	0	0	0	1	0	1	1	13	0	6.75	2.25	3.00	0.00	23.1	7.7	0.50	.111	0.00	2.25
12	Paul Hartzell P. Hartzell	2	6/26/1977	0	1.000	0	0.00	2	0	0	0	3.2	6	0	0	0	1	0	1	1	18	0	4.91	2.45	2.00	0.00	11.1	5.6	1.91	.400	0.00	14.73
13	Joe Kerrigan J. Kerrigan	2	9/8/1976	0	1.000	0	0.00	1	0	0	0	4.0	2	0	0	0	0	0	0	0	14	0	2.25	0.00		0.00	7.1	0.0	0.50	.154	0.00	4.50
14	John Hiller J. Hiller	2	6/1/1976	0	1.000	0	6.75	4	0	0	0	2.2	1	2	2	0	3	0	2	0	14	0	13.50	10.13	1.33	0.00	28.6	21.4	1.50	.143	6.75	3.38
15	Bob Miller B. Miller	2	6/23/1971	0	1.000	0	0.00	5	0	0	0	6.0	3	0	0	0	1	0	2	0	22	0	7.50	1.50	5.00	0.00	22.7	4.5	0.67	.188	0.00	4.50
16	Lindy McDaniel L. McDaniel	2	5/24/1970	0	1.000	0	0.00	1	0	0	0	4.1	4	0	0	0	0	0	1	0	17	0	2.08	0.00		0.00	5.9	0.0	0.92	.250	0.00	8.31
17	Jim Brewer J. Brewer	2	9/16/1969	0	1.000	0	0.00	5	0	0	0	5.0	2	0	0	0	0	1	2	0	18	0	9.00	0.00		0.00	27.8	0.0	0.40	.167	0.00	3.60
18	Wilbur Wood W. Wood	2	6/24/1969	0	1.000	0	0.00	5	0	0	0	5.2	2	0	0	0	0	0	2	0	19	0	7.94	0.00		0.00	26.3	0.0	0.35	.143	0.00	3.18
19	Phil Regan P. Regan	2	7/7/1968	0	1.000	0	0.00	3	0	0	0	2.1	4	0	0	0	0	0	2	0	11	0	11.57	0.00		0.00	27.3	0.0	1.71	.500	0.00	15.43
20	Ted Abernathy T. Abernathy	2	6/23/1968	0	1.000	0	1.50	1	0	0	0	6.0	5	1	1	0	1	0	2	1	24	0	1.50	1.50	1.00	0.00	4.2	4.2	1.00	.227	1.50	7.50
21	Phil Regan P. Regan	2	4/21/1968	0	1.000	0	3.38	5	0	0	0	5.1	8	2	2	1	0	0	0	0	24	0	8.44	0.00		1.69	20.8	0.0	1.50	.389	3.38	13.50
22	Don McMahon D. McMahon	2	7/6/1966	0	1.000	0	2.45	2	0	0	0	3.2	2	1	1	1	0	0	0	0	13	0	4.91	0.00		2.45	15.4	0.0	0.55	.100	2.45	4.91
23	Willard Hunter W. Hunter	2	8/23/1964	0	1.000	0	0.00	0	0	0	0	1.2	0	0	0	0	0	0	2	0	5	0	0.00	0.00		0.00	0.0	0.0	0.00	.000	0.00	0.00
24	Chi-Chi Olivo C. Olivo	2	7/26/1964	0	1.000	0	0.00	2	0	0	0	2.0	1	0	0	0	0	0	0	0	8	0	9.00	0.00		0.00	25.0	0.0	0.50	.167	0.00	4.50
25	John Wyatt J. Wyatt	2	5/3/1964	0	1.000	0	0.00	4	0	0	0	3.2	1	0	0	0	2	0	2	0	14	0	9.82	4.91	2.00	0.00	28.6	14.3	0.82	.125	0.00	2.45