worst winning percentage by a pitcher with 138 or more wins

Mike Morgan has the worst career win percentage when winning 138+ games, at .431.

	NAME	W	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	Mike Morgan M. Morgan	141	.431	186	597	411	4.23	1,403	46	10	8	2772.1	2,943	1,303	1,431	270	938	73	56	77	11,872	105	4.55	3.05	1.50	0.88	11.8	7.9	1.40	.291	4.65	102	4.26	103	9.55	-36.8
2	Chick Fraser C. Fraser	175	.452	212	434	388	3.67	1,098	342	22	6	3364.0	3,462	1,373	2,000	69	1,338	219	43		14,553	146	2.94	3.58	0.82	0.18	7.5	9.2	1.43	.287	5.35	110	3.76	111	9.26	-140.2
3	Red Ehret R. Ehret	139	.454	167	362	309	4.02	848	260	14	4	2754.1	3,172	1,229	1,881	63	841	139	48		12,232	103	2.77	2.75	1.01	0.21	6.9	6.9	1.46	.301	6.15	97	3.85	94	10.36	67.6
4	Jim Clancy J. Clancy	140	.456	167	472	381	4.23	1,422	74	11	10	2517.1	2,513	1,182	1,304	244	947	32	38	45	10,772	101	5.08	3.39	1.50	0.87	13.2	8.8	1.37	.279	4.66	104	4.03	101	8.98	-4.6
5	Ellsworth Cunningham E. Cunningham	142	.460	167	342	311	4.22	718	287	4	2	2734.2	3,071	1,283	1,942	62	1,064	148	28		12,285	161	2.36	3.50	0.67	0.20	5.8	8.7	1.51	.292	6.39	111	4.04	107	10.11	-91.1
6	Bob Friend B. Friend	197	.461	230	602	497	3.58	1,734	163	36	10	3611.0	3,772	1,438	1,652	286	894	46	56	115	15,214	50	4.32	2.23	1.94	0.71	11.4	5.9	1.29	.284	4.12	94	3.35	89	9.40	172.2
7	Kevin Gross K. Gross	142	.473	158	474	368	4.11	1,727	42	14	5	2487.2	2,519	1,137	1,245	230	986	79	38	76	10,791	53	6.25	3.57	1.75	0.83	16.0	9.1	1.41	.295	4.50	106	3.96	102	9.11	-26.8
8	Steve Trachsel S. Trachsel	143	.474	159	420	417	4.39	1,591	20	7	0	2501.0	2,587	1,219	1,327	348	943	52	1	63	10,799	64	5.73	3.39	1.69	1.25	14.7	8.7	1.41	.285	4.78	101	4.83	110	9.31	-121.2
9	Bobby Witt B. Witt	142	.475	157	430	397	4.83	1,955	47	11	0	2465.0	2,493	1,324	1,449	252	1,375	39	13	37	11,003	128	7.14	5.02	1.42	0.92	17.8	12.5	1.57	.304	5.29	111	4.41	102	9.10	-26.2
10	Woodie Fryman W. Fryman	141	.476	155	625	322	3.77	1,587	68	27	58	2411.1	2,367	1,010	1,136	187	890	68	160	79	10,291	68	5.92	3.32	1.78	0.70	15.4	8.6	1.35	.288	4.24	104	3.43	98	8.83	20.3
11	Mike Moore M. Moore	161	.478	176	450	440	4.39	1,667	79	16	2	2831.2	2,858	1,381	1,516	291	1,156	55	6	61	12,203	135	5.30	3.67	1.44	0.92	13.7	9.5	1.42	.284	4.82	105	4.26	101	9.08	-13.9
12	Tom Candiotti T. Candiotti	151	.479	164	451	410	3.73	1,735	68	11	0	2725.0	2,662	1,130	1,299	250	883	85	11	31	11,568	120	5.73	2.92	1.96	0.83	15.0	7.6	1.30	.280	4.29	92	3.90	95	8.79	46.7
13	Pink Hawley P. Hawley	167	.483	179	393	344	3.96	868	297	11	3	3012.2	3,334	1,326	1,927	61	974	210	43		13,213	83	2.59	2.91	0.89	0.18	6.6	7.4	1.43	.295	5.76	95	4.06	97	9.96	45.5
14	Mark Baldwin M. Baldwin	154	.483	165	346	328	3.37	1,349	295	14	5	2802.1	2,695	1,050	1,816	81	1,307	123	19		12,470	221	4.33	4.20	1.03	0.26	10.8	10.5	1.43	.272	5.83	91	3.79	100	8.66	-0.9
15	Jim Whitney J. Whitney	191	.484	204	413	396	2.97	1,571	377	26	2	3496.1	3,598	1,154	2,026	79	411	28	16		14,666	214	4.04	1.06	3.82	0.20	10.7	2.8	1.15	.280	5.22	96	2.75	87	9.26	148.2
16	Red Donahue R. Donahue	164	.484	175	367	340	3.61	787	312	25	3	2966.1	3,377	1,191	1,638	61	689	113	23		12,629	27	2.39	2.09	1.14	0.19	6.2	5.5	1.37	.302	4.97	103	3.38	98	10.25	8.4
17	Danny Darwin D. Darwin	171	.484	182	716	371	3.84	1,942	53	9	32	3016.2	2,951	1,286	1,431	321	874	81	171	101	12,716	52	5.79	2.61	2.22	0.96	15.3	6.9	1.27	.277	4.27	95	3.89	97	8.80	25.3
18	Ted Breitenstein T. Breitenstein	160	.485	170	380	342	4.03	893	301	12	3	2973.1	3,101	1,331	1,848	79	1,207	87	34		13,010	42	2.70	3.65	0.74	0.24	6.9	9.3	1.45	.281	5.59	93	4.26	98	9.39	41.8
19	Bob Knepper B. Knepper	146	.485	155	445	413	3.68	1,473	78	30	1	2708.0	2,737	1,106	1,258	228	857	47	10	78	11,488	60	4.90	2.85	1.72	0.76	12.8	7.5	1.33	.282	4.18	105	3.73	107	9.10	-85.1
20	Murry Dickson M. Dickson	172	.487	181	625	338	3.66	1,281	149	27	23	3052.1	3,029	1,240	1,431	302	1,058	37	148	18	12,936	34	3.78	3.12	1.21	0.89	9.9	8.2	1.34	.266	4.22	92	4.00	99	8.93	11.2
21	Bobo Newsom B. Newsom	211	.487	222	600	483	3.98	2,082	246	31	21	3759.1	3,769	1,664	1,908	206	1,732	61	71		16,467	60	4.98	4.15	1.20	0.49	12.6	10.5	1.46	.288	4.57	95	3.81	92	9.02	144.5
22	Jim Slaton J. Slaton	151	.489	158	496	360	4.03	1,191	86	22	14	2683.2	2,773	1,202	1,335	277	1,004	48	71	65	11,535	97	3.99	3.37	1.19	0.93	10.3	8.7	1.41	.277	4.48	106	4.26	111	9.30	-132.4
23	Jeff Suppan J. Suppan	140	.490	146	448	417	4.70	1,390	16	5	0	2542.2	2,843	1,328	1,451	337	871	94	16	58	11,139	89	4.92	3.08	1.60	1.19	12.5	7.8	1.46	.297	5.14	105	4.85	109	10.06	-111.6
24	Bill Dinneen B. Dinneen	170	.490	177	391	352	3.01	1,127	306	24	7	3074.2	2,957	1,029	1,411	78	829	76	35		12,548	68	3.30	2.43	1.36	0.23	9.0	6.6	1.23	.276	4.13	97	3.09	101	8.66	8.6
25	Jack Powell J. Powell	245	.491	254	578	516	2.97	1,621	422	46	15	4389.0	4,319	1,450	1,991	110	1,021	120	57		17,896	67	3.32	2.09	1.59	0.23	9.1	5.7	1.22	.280	4.08	95	3.01	97	8.86	35