most losses in a season by a pitcher with zero wins

6 pitchers were credited with 12 wins. The first three are John Coleman in 1883 and Stump Wiedman and Jim Whitney in 1886.

	NAME	W	L	SEASON	TM	W%	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	John Coleman J. Coleman	12	48	1883	PHN	.200	.800	65	61	4.87	159	59	3	0	538.1	772	291	510	17	48		4	2,546	9	2.66	0.80	3.31	0.28	6.2	1.9	1.52		8.53	158	3.34	109	12.91	-19.2
2	Will White W. White	18	42	1880	CIN	.300	.700	62	62	2.14	161	58	3	0	517.1	550	123	323	9	56		0	2,217	35	2.80	0.97	2.88	0.16	7.3	2.5	1.17		5.62	89	2.46	103	9.57	-2.2
3	Larry McKeon L. McKeon	18	41	1884	IND	.305	.695	61	60	3.50	308	59	2	0	512.0	488	199	350	20	94	18	1	2,185	36	5.41	1.65	3.28	0.35	14.1	4.3	1.14	.268	6.15	108	3.24	101	8.58	-1.7
4	George Bradley G. Bradley	13	40	1879	TRO	.245	.755	54	54	2.85	133	53	3	0	487.0	590	154	361	12	26		0	2,170	43	2.46	0.48	5.12	0.22	6.1	1.2	1.26		6.67	115	2.67	108	10.90	-12.6
5	Jim McCormick J. McCormick	20	40	1879	CLE	.333	.667	62	60	2.42	197	59	3	0	546.1	582	147	308	3	74		1	2,325	30	3.25	1.22	2.66	0.05	8.5	3.2	1.20		5.07	101	2.50	104	9.59	-13.4
6	George Cobb G. Cobb	10	37	1892	BAL	.213	.787	53	47	4.86	159	42	0	0	394.1	495	213	333	21	140	19	6	1,836	15	3.63	3.20	1.14	0.48	8.7	7.6	1.61	.317	7.60	145	3.53	105	11.30	-6.1
7	Kid Carsey K. Carsey	14	37	1891	WSH	.275	.725	54	53	4.99	174	46	1	0	415.0	513	230	358	17	161	28	1	1,937	29	3.77	3.49	1.08	0.37	9.0	8.3	1.62	.319	7.76	133	3.59	99	11.13	2.3
8	Henry Porter H. Porter	18	37	1888	KCC	.327	.673	55	54	4.16	145	53	4	0	474.0	527	219	336	16	120	23	1	2,084	24	2.75	2.28	1.21	0.30	7.0	5.8	1.36	.287	6.38	127	3.32	106	10.01	-1.6
9	William Hutchinson W. Hutchinson	36	36	1892	CHI	.500	.500	75	70	2.76	314	67	5	1	622.0	571	191	316	11	190	13	5	2,639	20	4.54	2.75	1.65	0.16	11.9	7.2	1.22	.265	4.57	82	2.63	79	8.26	51.2
10	Stump Wiedman S. Wiedman	12	36	1886	KCC	.250	.750	51	51	4.52	168	48	1	0	427.2	549	215	323	11	112		0	1,924	35	3.54	2.36	1.50	0.23	8.7	5.8	1.55		6.80	129	3.44	97	11.55	11.8
11	Red Donahue R. Donahue	10	35	1897	STL	.222	.778	46	42	6.13	64	38	1	1	348.0	485	237	306	16	106	22	4	1,612	9	1.66	2.74	0.60	0.41	4.0	6.6	1.70	.334	7.91	140	4.65	106	12.54	-8.7
12	Hardie Henderson H. Henderson	25	35	1885	BAL	.417	.583	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
13	Fleury Sullivan F. Sullivan	16	35	1884	PIT	.314	.686	51	51	4.20	189	51	2	0	441.0	496	206	328	15	96	20	0	1,967	25	3.86	1.96	1.97	0.31	9.6	4.9	1.34	.292	6.69	131	3.65	115	10.12	-24.7
14	Adonis Terry A. Terry	19	35	1884	BKN	.352	.648	56	55	3.55	230	54	2	0	476.0	486	188	308	10	72	8	1	2,049	33	4.35	1.36	3.19	0.19	11.2	3.5	1.17	.275	5.82	110	3.09	96	9.19	6.4
15	Pud Galvin P. Galvin	20	35	1880	BUF	.364	.636	58	54	2.71	128	46	5	0	458.2	528	138	281	5	32		4	1,969	24	2.51	0.63	4.00	0.10	6.5	1.6	1.22		5.51	112	2.33	96	10.36	7.2
16	Jim Devlin J. Devlin	30	35	1876	LOU	.462	.538	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
17	Amos Rusie A. Rusie	29	34	1890	NYN	.460	.540	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
18	Mark Baldwin M. Baldwin	27	34	1889	COL	.443	.557	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
19	Al Mays A. Mays	17	34	1887	NYM	.333	.667	52	52	4.73	124	50	0	0	441.1	551	232	359	11	136	20	1	2,002	36	2.53	2.77	0.91	0.22	6.2	6.8	1.56	.316	7.32	113	4.10	102	11.24	-5.5
20	Matt Kilroy M. Kilroy	29	34	1886	BAL	.460	.540	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
21	Bob Barr B. Barr	12	34	1884	TOT	.261	.739	48	48	3.94	207	47	2	0	413.0	471	181	327	11	50	18	0	1,853	39	4.51	1.09	4.14	0.24	11.2	2.7	1.26	.294	7.13	125	3.11	100	10.26	-3.1
22	Bobby Mathews B. Mathews	21	34	1876	NYM	.382	.618	56	56	2.86	37	55	2	0	516.0	693	164	395	8	24		0	2,327	3	0.65	0.42	1.54	0.14	1.6	1.0	1.39		6.89	128	2.43	109	12.09	-17.6
23	Jersey Bakley J. Bakley	25	33	1888	CLE	.431	.569	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
24	Dupee Shaw D. Shaw	30	33	1884	TOT	.476	.524	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
25	Hardie Henderson H. Henderson	10	33	1883	TOT	.233	.767	46	43	4.39	147	39	0	0	367.1	409	179	339	4	89		3	1,638	32	3.60	2.18	1.65	0.10	9.0	5.4	1.36		8.31	134	3.32	101	10.02	-1.4