mlb player with lowest career winning percentage, minimum 400 games

Fernando Abad had the lowest win percentage when pitching in 400+ games, at .237.

	NAME	W%	G	W	L	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	Fernando Abad F. Abad	.237	406	9	29	6	3.78	292	0	0	2	354.2	343	149	158	45	126	12	103	11	1,513	10	7.41	3.20	2.32	1.14	19.3	8.3	1.32	.287	4.01	93	4.29	106	8.70	-10.1
2	Jorge Julio J. Julio	.333	453	17	34	0	4.43	448	0	0	99	467.0	437	230	259	65	233	19	265	21	2,065	52	8.63	4.49	1.92	1.25	21.7	11.3	1.43	.286	4.99	100	4.58	102	8.42	-3
3	Marc Rzepczynski M. Rzepczynski	.341	506	14	27	23	3.89	409	0	0	2	434.2	419	188	218	36	205	25	68	29	1,892	30	8.47	4.24	2.00	0.75	21.6	10.8	1.44	.315	4.51	96	3.87	95	8.68	10.2
4	Kevin Jepsen K. Jepsen	.353	469	18	33	0	4.00	373	0	0	27	416.2	400	185	200	37	169	9	100	22	1,782	37	8.06	3.65	2.21	0.80	20.9	9.5	1.37	.304	4.32	99	3.75	92	8.64	14
5	Joel Peralta J. Peralta	.364	620	20	35	0	4.03	612	0	0	15	648.0	566	290	303	95	185	13	140	23	2,657	22	8.50	2.57	3.31	1.32	23.0	7.0	1.16	.269	4.21	97	4.04	98	7.86	5
6	Tommy Kahnle T. Kahnle	.367	456	11	19	0	3.61	502	0	0	17	436.2	337	175	204	48	204	12	91	9	1,833	36	10.35	4.20	2.46	0.99	27.4	11.1	1.24	.271	4.20	84	3.77	89	6.95	24.5
7	Dan Wheeler D. Wheeler	.368	589	25	43	9	3.98	555	0	0	43	640.2	589	283	298	89	194	13	187	32	2,680	20	7.80	2.73	2.86	1.25	20.7	7.2	1.22	.273	4.19	92	4.13	95	8.27	14.6
8	Skip Lockwood S. Lockwood	.370	420	57	97	106	3.55	829	16	5	68	1236.0	1,130	488	539	98	490	33	219	62	5,215	43	6.04	3.57	1.69	0.71	15.9	9.4	1.31	.274	3.92	101	3.52	97	8.23	14.3
9	Mike Williams M. Williams	.372	468	32	54	55	4.45	584	1	0	144	768.1	764	380	416	89	343	20	292	40	3,355	39	6.84	4.02	1.70	1.04	17.4	10.2	1.44	.291	4.87	105	4.48	105	8.95	-17.2
10	Jack Russell J. Russell	.376	557	85	141	182	4.46	418	71	3	39	2050.2	2,454	1,017	1,187	83	571	26	209		9,020	22	1.83	2.51	0.73	0.36	4.6	6.3	1.48	.299	5.21	104	4.07	96	10.77	34.5
11	Brian Fuentes B. Fuentes	.377	650	26	43	0	3.62	639	0	0	204	613.1	515	247	267	64	258	52	381	25	2,622	32	9.38	3.79	2.48	0.94	24.4	9.8	1.26	.280	3.92	81	3.86	88	7.56	37.4
12	Mark Davis M. Davis	.378	624	51	84	85	4.17	1,007	4	2	96	1145.0	1,068	530	582	129	534	28	265	63	4,955	63	7.92	4.20	1.89	1.01	20.3	10.8	1.40	.288	4.57	113	3.96	106	8.39	-29.5
13	Si Johnson S. Johnson	.380	492	101	165	272	4.09	840	108	13	15	2281.1	2,510	1,036	1,226	121	687	36	115		9,903	26	3.31	2.71	1.22	0.48	8.5	6.9	1.40	.291	4.84	109	3.77	99	9.90	8.4
14	Jack Fisher J. Fisher	.382	400	86	139	265	4.06	1,017	62	9	9	1975.2	2,061	891	1,024	193	605	52	65	39	8,452	56	4.63	2.76	1.68	0.88	12.0	7.2	1.35	.284	4.66	115	3.77	108	9.39	-59.3
15	Blaine Boyer B. Boyer	.386	447	17	27	0	4.55	292	0	0	5	468.1	505	237	269	38	165	13	119	19	2,026	17	5.61	3.17	1.77	0.73	14.4	8.1	1.43	.308	5.17	109	4.06	98	9.70	3.8
16	Jeff Shaw J. Shaw	.386	633	34	54	19	3.54	545	0	0	203	848.0	821	334	368	91	234	25	384	44	3,549	18	5.78	2.48	2.33	0.97	15.4	6.6	1.24	.275	3.91	85	4.08	97	8.71	15.2
17	Ken Sanders K. Sanders	.392	409	29	45	1	2.97	360	0	0	86	656.2	564	217	240	50	258	17	285	67	2,741	9	4.93	3.54	1.40	0.69	13.1	9.4	1.25	.250	3.29	85	3.68	102	7.73	-3.9
18	Joe Borowski J. Borowski	.393	423	22	34	1	4.18	372	0	0	131	454.1	450	211	222	53	177	7	268	32	1,968	6	7.37	3.51	2.10	1.05	18.9	9.0	1.38	.292	4.40	97	4.17	96	8.91	8.4
19	Kyle Farnsworth K. Farnsworth	.394	893	43	66	26	4.26	963	1	1	57	988.2	944	468	509	132	412	28	293	37	4,281	43	8.77	3.75	2.34	1.20	22.5	9.6	1.37	.296	4.63	99	4.20	96	8.59	16.3
20	Kevin Gregg K. Gregg	.395	594	30	46	8	4.24	661	0	0	177	720.1	673	339	365	78	329	29	382	21	3,144	52	8.26	4.11	2.01	0.97	21.0	10.5	1.39	.291	4.56	100	4.15	98	8.41	10.1
21	Carlos Marmol C. Marmol	.397	519	23	35	13	3.57	744	0	0	117	577.0	385	229	242	49	395	51	259	22	2,521	35	11.60	6.16	1.88	0.76	29.5	15.7	1.35	.262	3.77	85	3.95	94	6.01	15.6
22	Gary Lucas G. Lucas	.397	409	29	44	18	3.01	410	0	0	63	669.0	618	224	274	41	227	7	206	65	2,795	24	5.52	3.05	1.81	0.55	14.7	8.1	1.26	.273	3.69	84	3.35	91	8.31	25.5
23	Bill Caudill B. Caudill	.402	445	35	52	24	3.68	620	0	0	106	667.0	587	273	297	81	288	14	293	40	2,847	15	8.37	3.89	2.15	1.09	21.8	10.1	1.31	.274	4.01	92	3.80	96	7.92	13.3
24	Tom Murphy T. Murphy	.402	439	68	101	147	3.78	621	22	3	59	1444.0	1,425	606	664	123	493	63	204	73	6,091	67	3.87	3.07	1.26	0.77	10.2	8.1	1.33	.272	4.14	107	3.94	110	8.88	-59.8
25	Jim Acker J. Acker	.402	467	33	49	32	3.97	482	0	0	30	904.1	918	399	447	82	329	32	159	40	3,868	31	4.80	3.27	1.47	0.82	12.5	8.5	1.38	.284	4.45	98	4.09	101	9.14	-6