Kip Wells lost the most games in 2005, with 18 games.

	NAME	L	SEASON	TM	W	L%	G	W%	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	Kip Wells K. Wells	18	2005	PIT	8	.692	33	.308	33	5.09	132	1	1	0	182.0	186	103	116	23	99	12	0	8	828	8	6.53	4.90	1.33	1.14	15.9	12.0	1.57	.290	5.74	122	5.03	121	9.20	-18.1
2	Zack Greinke Z. Greinke	17	2005	KCR	5	.773	33	.227	33	5.80	114	2	0	0	183.0	233	118	125	23	53	13	0	0	829	4	5.61	2.61	2.15	1.13	13.8	6.4	1.56	.335	6.15	130	4.48	104	11.46	-3.3
3	Jose Lima J. Lima	16	2005	KCR	5	.762	32	.238	32	6.99	80	1	0	0	168.2	219	131	140	31	61	9	0	1	780	5	4.27	3.25	1.31	1.65	10.3	7.8	1.66	.314	7.47	156	5.70	132	11.69	-25.8
4	Nate Robertson N. Robertson	16	2005	DET	7	.696	32	.304	32	4.48	122	2	0	0	196.2	202	98	113	28	65	7	0	2	846	6	5.58	2.97	1.88	1.28	14.4	7.7	1.36	.279	5.17	105	4.72	109	9.24	-8.7
5	Jamey Wright J. Wright	16	2005	COL	8	.667	34	.333	27	5.46	101	0	0	0	171.1	201	104	119	22	81	15	1	4	782	2	5.31	4.25	1.25	1.16	12.9	10.4	1.65	.318	6.25	118	5.18	116	10.56	-12.7
6	Ryan Franklin R. Franklin	15	2005	SEA	8	.652	32	.348	30	5.10	93	2	1	0	190.2	212	108	110	28	62	7	0	4	832	3	4.39	2.93	1.50	1.32	11.2	7.5	1.44	.287	5.19	122	5.03	118	10.01	-16.2
7	Brian Lawrence B. Lawrence	15	2005	SDP	7	.682	33	.318	33	4.83	109	1	0	0	195.2	211	105	106	18	57	11	0	7	852	3	5.01	2.62	1.91	0.83	12.8	6.7	1.37	.294	4.88	124	4.13	101	9.71	-1.6
8	Derek Lowe D. Lowe	15	2005	LAD	12	.556	35	.444	35	3.61	146	2	2	0	222.0	223	89	113	28	55	5	0	1	934	3	5.92	2.23	2.65	1.14	15.6	5.9	1.25	.279	4.58	87	4.14	98	9.04	2.5
9	Greg Maddux G. Maddux	15	2005	CHC	13	.536	35	.464	35	4.24	136	3	0	0	225.0	239	106	112	29	36	7	0	4	936	8	5.44	1.44	3.78	1.16	14.5	3.8	1.22	.288	4.48	98	4.05	93	9.56	7.1
10	Eric Milton E. Milton	15	2005	CIN	8	.652	34	.348	34	6.47	123	0	0	0	186.1	237	134	141	40	52	7	0	2	855	8	5.94	2.51	2.37	1.93	14.4	6.1	1.55	.311	6.81	152	5.43	124	11.45	-21
11	Mark Redman M. Redman	15	2005	PIT	5	.750	30	.250	30	4.90	101	2	1	0	178.1	188	97	100	18	56	2	0	3	751	7	5.10	2.83	1.80	0.91	13.4	7.5	1.37	.296	5.05	117	4.16	100	9.49	-0.2
12	Brett Tomko B. Tomko	15	2005	SFG	8	.652	33	.348	30	4.48	114	3	0	1	190.2	205	95	99	20	57	7	1	11	823	5	5.38	2.69	2.00	0.94	13.9	6.9	1.37	.296	4.67	106	4.18	102	9.68	-1.7
13	Javier Vazquez J. Vazquez	15	2005	ARI	11	.577	33	.423	33	4.42	192	3	1	0	215.2	223	106	112	35	46	5	0	4	904	7	8.01	1.92	4.17	1.46	21.2	5.1	1.25	.300	4.67	100	4.05	93	9.31	7.8
14	Jake Westbrook J. Westbrook	15	2005	CLE	15	.500	34	.500	34	4.49	119	2	0	0	210.2	218	105	121	19	56	7	0	3	895	3	5.08	2.39	2.13	0.81	13.3	6.3	1.30	.287	5.17	105	3.95	94	9.31	5.5
15	Runelvys Hernandez R. Hernandez	14	2005	KCR	8	.636	29	.364	29	5.52	88	0	0	0	159.2	172	98	101	18	70	7	0	0	706	4	4.96	3.95	1.26	1.01	12.5	9.9	1.52	.294	5.69	123	4.82	112	9.70	-8.9
16	Mike Maroth M. Maroth	14	2005	DET	14	.500	34	.500	34	4.74	115	0	0	0	209.0	235	110	123	30	51	9	0	1	889	5	4.95	2.20	2.25	1.29	12.9	5.7	1.37	.300	5.30	111	4.64	107	10.12	-7.4
17	Jason Marquis J. Marquis	14	2005	STL	13	.519	33	.481	32	4.13	100	3	1	0	207.0	206	95	110	29	69	5	0	2	868	10	4.35	3.00	1.45	1.26	11.5	7.9	1.33	.266	4.78	100	4.94	119	8.96	-18.4
18	Jeremy Bonderman J. Bonderman	13	2005	DET	14	.481	29	.519	29	4.57	145	4	0	0	189.0	199	96	101	21	57	4	0	0	801	5	6.90	2.71	2.54	1.00	18.1	7.1	1.35	.310	4.81	107	3.89	90	9.48	9
19	Daniel Cabrera D. Cabrera	13	2005	BAL	10	.565	29	.435	29	4.52	157	0	0	0	161.1	144	81	92	14	87	11	0	2	716	9	8.76	4.85	1.80	0.78	21.9	12.2	1.43	.291	5.13	105	4.01	90	8.03	7.8
20	Tom Glavine T. Glavine	13	2005	NYM	13	.500	33	.500	33	3.53	105	2	1	0	211.1	227	83	88	12	61	3	0	5	901	1	4.47	2.60	1.72	0.51	11.7	6.8	1.36	.299	3.75	85	3.66	88	9.67	11.8
21	Aaron Harang A. Harang	13	2005	CIN	11	.542	32	.458	32	3.83	163	1	0	0	211.2	217	90	93	22	51	8	0	3	887	6	6.93	2.17	3.20	0.94	18.4	5.7	1.27	.303	3.95	90	3.66	84	9.23	16.6
22	Jason Johnson J. Johnson	13	2005	DET	8	.619	33	.381	33	4.54	93	1	0	0	210.0	233	106	117	23	49	6	0	4	888	17	3.99	2.10	1.90	0.99	10.5	5.5	1.34	.293	5.01	107	4.33	100	9.99	-0.3
23	Joe Kennedy J. Kennedy	13	2005	TOT	8	.619	35	.381	24	6.01	97	0	0	0	152.2	192	102	114	20	64	7	3	6	704	8	5.72	3.77	1.52	1.18	13.8	9.1	1.68	.333	6.72	133	4.84	110	11.32	-6.8
24	Jon Lieber J. Lieber	13	2005	PHI	17	.433	35	.567	35	4.20	149	1	0	0	218.1	223	102	107	33	41	5	0	6	912	3	6.14	1.69	3.63	1.36	16.3	4.5	1.21	.278	4.41	98	4.24	97	9.19	3.4
25	Kyle Lohse K. Lohse	13	2005	MIN	9	.591	31	.409	30	4.18	86	0	0	0	178.2	211	83	85	22	44	9	1	5	769	4	4.33	2.22	1.95	1.11	11.2	5.7	1.43	.311	4.28	97	4.54	108	10.63	-7.4