most wins by a pitcher in a season that was on a team with an under.500 winning percentage

Jim Whitney has the most wins with a win percentage below .500 in a season, with 31 wins in his rookie season in 1881.

	NAME	W	W%	SEASON	TM	L	G	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Jim Whitney J. Whitney	31	.484	1881	BOS	33	66	63	2.48	162	57	6	0	552.1	548	152	284	6	90		3	2,301	46	2.64	1.47	1.80	0.10	7.0	3.9	1.16		4.63	90	2.73	99	8.93	-0.4
2	Dupee Shaw D. Shaw	30	.476	1884	TOT	33	67	66	2.30	451	60	5	0	543.1	446	139	281	9	109		1	2,244	24	7.47	1.81	4.14	0.15	20.1	4.9	1.02		4.65	77	2.43	81	7.39	29
3	Jim Devlin J. Devlin	30	.462	1876	LOU	35	68	68	1.56	122	66	5	0	622.0	566	108	309	3	37		0	2,568	14	1.77	0.54	3.30	0.04	4.8	1.4	0.97		4.47	62	2.08	82	8.19	50.7
4	Amos Rusie A. Rusie	29	.460	1890	NYN	34	67	62	2.56	341	56	4	1	548.2	436	156	300	3	289	26	5	2,379	36	5.59	4.74	1.18	0.05	14.3	12.1	1.32	.252	4.92	73	3.47	92	7.15	17.7
5	Matt Kilroy M. Kilroy	29	.460	1886	BAL	34	68	68	3.37	513	66	5	0	583.0	476	218	350	10	182	19	0	2,469	61	7.92	2.81	2.82	0.15	20.8	7.4	1.13	.267	5.40	100	2.60	77	7.35	47
6	Mark Baldwin M. Baldwin	27	.443	1889	COL	34	63	59	3.61	368	54	6	1	513.2	458	206	358	9	274	20	4	2,275	83	6.45	4.80	1.34	0.16	16.2	12.0	1.43	.280	6.27	100	3.52	98	8.02	-3
7	Old Hoss Radbourn O. Hoss Radbourn	27	.466	1886	BSN	31	58	58	3.00	218	57	3	0	509.1	521	170	300	18	111		0	2,162	22	3.85	1.96	1.96	0.32	10.1	5.1	1.24		5.30	93	3.36	104	9.21	-9.3
8	Mark Baldwin M. Baldwin	26	.491	1892	PIT	27	56	53	3.47	157	45	0	0	440.1	447	170	272	11	194	22	3	1,983	17	3.21	3.97	0.81	0.22	7.9	9.8	1.46	.273	5.56	108	3.52	109	9.14	-16.9
9	Gus Weyhing G. Weyhing	26	.481	1887	PHA	28	55	55	4.27	193	53	2	0	466.1	465	221	342	12	167	37	0	2,042	49	3.72	3.22	1.16	0.23	9.5	8.2	1.36	.277	6.60	99	4.10	99	8.97	1.2
10	Frank Mountain F. Mountain	26	.441	1883	COL	33	59	59	3.60	159	57	4	0	503.0	546	201	345	8	123		0	2,230	21	2.84	2.20	1.29	0.14	7.1	5.5	1.33		6.17	115	3.56	114	9.77	-33.3
11	Jim McCormick J. McCormick	26	.464	1881	CLE	30	59	58	2.45	178	57	2	0	526.0	484	143	267	4	84		1	2,145	24	3.05	1.44	2.12	0.07	8.3	3.9	1.08		4.57	92	2.59	97	8.28	-1.1
12	Tommy Bond T. Bond	26	.473	1880	BOS	29	63	57	2.67	118	49	3	0	493.0	559	146	298	1	45		6	2,082	24	2.15	0.82	2.62	0.02	5.7	2.2	1.23		5.44	115	2.35	101	10.20	-4.2
13	Jersey Bakley J. Bakley	25	.431	1888	CLE	33	61	61	2.97	212	60	4	0	532.2	518	176	321	14	128	15	0	2,251	40	3.58	2.16	1.66	0.24	9.4	5.7	1.21	.268	5.42	97	2.93	100	8.75	0.1
14	Phenomenal Smith P. Smith	25	.455	1887	BAL	30	58	55	3.79	206	54	1	0	491.1	526	207	369	7	176	14	3	2,204	12	3.77	3.22	1.17	0.13	9.3	8.0	1.43	.288	6.76	90	3.78	94	9.64	11.4
15	Hardie Henderson H. Henderson	25	.417	1885	BAL	35	61	61	3.19	263	59	0	0	539.1	539	191	311	7	117	19	0	2,268	51	4.39	1.95	2.25	0.12	11.6	5.2	1.22	.286	5.19	98	2.83	93	8.99	12.5
16	Lee Richmond L. Richmond	25	.490	1881	WOR	26	53	52	3.39	156	50	3	0	462.1	547	174	302	7	68		1	1,992	24	3.04	1.32	2.29	0.14	7.8	3.4	1.33		5.88	114	2.65	89	10.65	23.3
17	Tony Mullane T. Mullane	23	.469	1891	CNN	26	51	47	3.23	124	42	1	0	426.1	390	153	250	15	187	18	4	1,870	18	2.62	3.95	0.66	0.32	6.6	10.0	1.35	.246	5.28	97	3.85	111	8.23	-18
18	Pud Galvin P. Galvin	23	.479	1888	PIT	25	50	50	2.63	107	49	6	0	437.1	446	128	190	9	53	8	0	1,809	11	2.20	1.09	2.02	0.19	5.9	2.9	1.14	.268	3.91	102	2.78	103	9.18	-14.6
19	Dupee Shaw D. Shaw	23	.469	1885	PRO	26	49	49	2.57	194	47	6	0	399.2	343	114	209	7	99		0	1,740	32	4.37	2.23	1.96	0.16	11.1	5.7	1.11		4.71	95	2.88	99	7.72	-3.2
20	Silver King S. King	22	.478	1892	NYG	24	51	47	3.29	170	45	1	0	410.1	392	150	250	15	171	21	4	1,814	21	3.73	3.75	0.99	0.33	9.4	9.4	1.37	.262	5.48	103	3.49	109	8.60	-16.8
21	Ice Box Chamberlain I. Box Chamberlain	22	.489	1891	PHA	23	49	46	4.22	204	44	0	0	405.2	397	190	263	10	206	12	3	1,822	21	4.53	4.57	0.99	0.22	11.2	11.3	1.49	.278	5.83	113	3.46	96	8.81	8.2
22	Ed Beatin E. Beatin	22	.423	1890	CLN	30	54	54	3.83	155	53	1	0	474.1	518	202	300	11	186	15	0	2,127	17	2.94	3.53	0.83	0.21	7.3	8.7	1.48	.288	5.69	108	3.83	101	9.83	-1.1
23	Henry Gruber H. Gruber	22	.489	1890	CLP	23	48	44	4.27	110	39	1	0	383.1	464	182	352	15	204	15	4	1,839	36	2.58	4.79	0.54	0.35	6.0	11.1	1.74	.300	8.26	105	4.56	113	10.89	-27.7
24	Ellsworth Cunningham E. Cunningham	22	.431	1888	BAL	29	51	51	3.39	186	50	0	0	453.1	412	171	275	8	157	30	0	1,952	47	3.69	3.12	1.18	0.16	9.5	8.0	1.26	.257	5.46	113	3.23	112	8.18	-20.2
25	Charlie Buffinton C. Buffinton	22	.449	1885	BSN	27	51	50	2.88	242	49	6	0	434.1	425	139	238	10	112		1	1,838	28	5.01	2.32	2.16	0.21	13.2	6.1	1.24		4.93	104	2.84	96	8.81	3.9