Jim Hughey has the lowest career win percentage, at .266.

Interpreted as:

lowest w% with a minimum of 100 decisions in a career by a pitcher

	NAME	W%	DEC	W	L	G	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	ERA-	FIP	FIP-	H/9	PRAA
1	Jim Hughey J. Hughey	.266	109	29	80	145	113	4.87	250	100	0	1	1007.2	1,271	545	748	21	317	54	28		4,528	37	2.23	2.83	0.79	0.19	5.5	7.0	1.58	.322	6.68	125	3.86	100	11.35	-0.9
2	Happy Townsend H. Townsend	.293	116	34	82	153	125	3.59	473	107	5	0	1137.2	1,154	454	640	24	416	57	26		4,849	51	3.74	3.29	1.14	0.19	9.8	8.6	1.38	.291	5.06	123	3.28	114	9.13	-51.3
3	Jesse Jefferson J. Jefferson	.325	120	39	81	237	144	4.81	522	25	4	1	1085.2	1,151	580	642	118	520	14	40	23	4,786	33	4.33	4.31	1.00	0.98	10.9	10.9	1.54	.286	5.32	122	4.57	117	9.54	-78.6
4	George Smith G. Smith	.325	120	39	81	229	115	3.89	263	53	5	4	1143.1	1,321	494	643	54	255	26	79		4,874	23	2.07	2.01	1.03	0.43	5.4	5.2	1.38	.296	5.06	108	3.64	99	10.40	11
5	Mal Eason M. Eason	.330	109	36	73	125	114	3.42	274	90	10	1	951.1	1,027	362	515	20	291	42	11		4,011	13	2.59	2.75	0.94	0.19	6.8	7.3	1.39	.298	4.87	120	3.38	116	9.72	-52.3
6	Buster Brown B. Brown	.331	154	51	103	234	165	3.21	501	107	10	4	1451.2	1,368	517	715	36	631	59	55		6,029	53	3.11	3.91	0.79	0.22	8.3	10.5	1.38	.277	4.43	105	3.52	115	8.48	-61.1
7	Bill Bailey B. Bailey	.333	114	38	76	203	117	3.57	570	70	8	0	1084.1	1,035	430	593	20	527	44	56		4,573	43	4.73	4.37	1.08	0.17	12.5	11.5	1.44	.297	4.92	125	3.16	115	8.59	-48.7
8	Bob Barr B. Barr	.333	147	49	98	159	152	3.85	588	141	6	1	1328.1	1,460	568	938	31	363	17	7		5,914	107	3.98	2.46	1.62	0.21	9.9	6.1	1.37	.292	6.36	116	3.41	104	9.89	-33.9
9	Hugh Mulcahy H. Mulcahy	.336	134	45	89	220	145	4.49	314	63	5	8	1161.2	1,271	579	695	69	487	39	47		5,161	36	2.43	3.77	0.64	0.53	6.1	9.4	1.51	.283	5.38	113	4.50	110	9.85	-47.8
10	Rollie Naylor R. Naylor	.336	125	42	83	181	136	3.94	282	66	2	0	1010.1	1,174	442	584	34	346	17	28		4,362	22	2.51	3.08	0.82	0.30	6.5	7.9	1.50	.310	5.20	100	3.78	98	10.46	11.5
11	Gus Dorner G. Dorner	.337	104	35	69	131	106	3.37	275	76	8	1	910.1	842	341	472	18	330	51	20		3,747	18	2.72	3.26	0.83	0.18	7.3	8.8	1.29	.268	4.67	130	3.20	117	8.32	-45.1
12	Steve Arlin S. Arlin	.337	101	34	67	141	123	4.33	463	32	11	1	788.2	792	379	431	61	373	18	7	41	3,474	45	5.28	4.26	1.24	0.70	13.3	10.7	1.48	.286	4.92	127	3.79	113	9.04	-43.7
13	Bill Hill B. Hill	.343	105	36	69	124	115	4.16	280	92	3	3	925.0	994	428	607	24	406	59	8		4,111	23	2.72	3.95	0.69	0.23	6.8	9.9	1.51	.290	5.91	105	4.33	108	9.67	-37.1
14	Kaiser Wilhelm K. Wilhelm	.348	161	56	105	216	158	3.44	444	118	12	5	1432.1	1,495	547	753	34	418	24	45		5,907	34	2.79	2.63	1.06	0.21	7.5	7.1	1.34	.293	4.73	122	2.98	108	9.39	-35.6
15	George Bell G. Bell	.352	122	43	79	160	124	2.85	376	92	17	4	1086.0	1,010	344	471	15	305	18	33		4,295	12	3.12	2.53	1.23	0.12	8.8	7.1	1.21	.278	3.90	109	2.65	99	8.37	0.5
16	Bill Hart B. Hart	.355	186	66	120	206	190	4.65	431	162	5	3	1582.0	1,819	817	1,214	43	704	71	16		7,243	80	2.45	4.01	0.61	0.24	6.0	9.7	1.59	.297	6.91	115	4.43	110	10.35	-71.1
17	Boom-Boom Beck B. Beck	.355	107	38	69	265	101	4.28	352	44	3	7	1032.2	1,118	491	558	62	342	42	94		4,533	10	3.07	2.98	1.03	0.54	7.8	7.5	1.41	.283	4.86	117	3.99	106	9.74	-27.2
18	Jason Johnson J. Johnson	.359	156	56	100	255	221	4.99	810	6	1	0	1357.0	1,521	753	831	181	498	57	8	25	5,996	65	5.37	3.30	1.63	1.20	13.5	8.3	1.49	.301	5.51	112	4.82	107	10.09	-47.6
19	Socks Seibold S. Seibold	.361	133	48	85	191	135	4.43	296	64	8	5	1063.2	1,179	523	617	60	405	16	35		4,651	15	2.50	3.43	0.73	0.51	6.4	8.7	1.49	.289	5.22	117	4.38	112	9.98	-54.7
20	José Ureña J. Ureña	.364	121	44	77	242	155	4.78	648	1	0	6	970.2	1,003	515	552	135	360	49	33	26	4,209	24	6.01	3.34	1.80	1.25	15.4	8.6	1.40	.288	5.12	116	4.89	118	9.30	-83.6
21	Egyptian Healy E. Healy	.364	214	78	136	227	222	3.84	822	208	9	0	1875.0	1,920	799	1,270	63	599	70	5		8,148	159	3.95	2.88	1.37	0.30	10.1	7.4	1.34	.282	6.10	108	3.54	99	9.22	7.3
22	Duane Pillette D. Pillette	.365	104	38	66	188	119	4.40	305	34	4	3	904.0	985	442	498	67	391	17	25	5	4,014	15	3.04	3.89	0.78	0.67	7.6	9.7	1.52	.284	4.96	108	4.11	102	9.81	-8.6
23	Pete Broberg P. Broberg	.366	112	41	71	206	134	4.56	536	26	6	1	963.0	942	488	552	86	478	52	19	25	4,249	50	5.01	4.47	1.12	0.80	12.6	11.2	1.47	.276	5.16	129	4.23	117	8.80	-67.9
24	Matt Young M. Young	.367	150	55	95	333	163	4.40	857	20	5	25	1189.2	1,207	582	661	99	565	37	73	28	5,236	56	6.48	4.27	1.52	0.75	16.4	10.8	1.49	.301	5.00	107	3.93	96	9.13	25
25	Gordon Rhodes G. Rhodes	.368	117	43	74	200	135	4.85	356	47	1	4	1048.2	1,196	565	676	74	477	10	34		4,759	19	3.06	4.09	0.75	0.64	7.5	10.0	1.60	.292	5.80	106	4.69	105	10.26	-28.9