Roy Halladay won the most games in 2003, with 22 wins.

	NAME	W	SEASON	TM	L	W%	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	Roy Halladay R. Halladay	22	2003	TOR	7	.759	36	36	3.25	204	9	2	0	266.0	253	96	111	26	32	9	0	1	1,071	6	6.90	1.08	6.38	0.88	19.0	3.0	1.07	.284	3.76	70	3.22	71	8.56	38.6
2	Esteban Loaiza E. Loaiza	21	2003	CWS	9	.700	34	34	2.90	207	1	0	0	226.1	196	73	75	17	56	10	0	2	922	3	8.23	2.23	3.70	0.68	22.5	6.1	1.11	.283	2.98	63	3.05	65	7.79	39.7
3	Jamie Moyer J. Moyer	21	2003	SEA	7	.750	33	33	3.27	129	1	0	0	215.0	199	78	83	19	66	8	0	3	897	0	5.40	2.76	1.95	0.80	14.4	7.4	1.23	.267	3.47	76	4.01	92	8.33	8.7
4	Russ Ortiz R. Ortiz	21	2003	ATL	7	.750	34	34	3.81	149	1	1	0	212.1	177	90	101	17	102	4	0	7	912	5	6.32	4.32	1.46	0.72	16.3	11.2	1.31	.250	4.28	89	4.16	97	7.50	3
5	Andy Pettitte A. Pettitte	21	2003	NYY	8	.724	33	33	4.02	180	1	0	0	208.1	227	93	109	21	50	1	0	3	896	5	7.78	2.16	3.60	0.91	20.1	5.6	1.33	.320	4.71	90	3.34	75	9.81	25.9
6	Mark Prior M. Prior	18	2003	CHC	6	.750	30	30	2.43	245	3	1	0	211.1	183	57	67	15	50	9	0	4	863	9	10.43	2.13	4.90	0.64	28.4	5.8	1.10	.309	2.85	57	2.47	56	7.79	44.5
7	Woody Williams W. Williams	18	2003	STL	9	.667	34	33	3.87	153	0	0	0	220.2	220	95	101	20	55	11	1	2	944	3	6.24	2.24	2.78	0.82	16.2	5.8	1.25	.284	4.12	92	3.71	87	8.97	13.2
8	Roger Clemens R. Clemens	17	2003	NYY	9	.654	33	33	3.91	190	1	1	0	211.2	199	92	99	24	58	5	0	1	878	5	8.08	2.47	3.28	1.02	21.6	6.6	1.21	.291	4.21	87	3.60	81	8.46	20.3
9	Derek Lowe D. Lowe	17	2003	BOS	7	.708	33	33	4.47	110	1	0	0	203.1	216	101	113	17	72	11	0	4	886	3	4.87	3.19	1.53	0.75	12.4	8.1	1.42	.294	5.00	97	4.25	97	9.56	2.5
10	Mike Mussina M. Mussina	17	2003	NYY	8	.680	31	31	3.40	195	2	1	0	214.2	192	81	86	21	40	3	0	4	855	4	8.18	1.68	4.88	0.88	22.8	4.7	1.08	.287	3.61	76	3.08	69	8.05	32.9
11	Sidney Ponson S. Ponson	17	2003	TOT	12	.586	31	31	3.75	134	4	0	0	216.0	211	90	94	16	61	5	0	5	898	9	5.58	2.54	2.20	0.67	14.9	6.8	1.26	.286	3.92	87	3.66	83	8.79	18
12	Jason Schmidt J. Schmidt	17	2003	SFG	5	.773	29	29	2.34	208	5	3	0	207.2	152	54	56	14	46	5	0	1	819	7	9.01	1.99	4.52	0.61	25.4	5.6	0.95	.253	2.43	56	2.63	63	6.59	36.3
13	Tim Hudson T. Hudson	16	2003	OAK	7	.696	34	34	2.70	162	3	2	0	240.0	197	72	84	15	61	10	0	9	967	6	6.08	2.29	2.66	0.56	16.8	6.3	1.08	.253	3.15	60	3.37	75	7.39	29.9
14	Greg Maddux G. Maddux	16	2003	ATL	11	.593	36	36	3.96	124	1	0	0	218.1	225	96	112	24	33	8	0	7	901	3	5.11	1.36	3.76	0.99	13.8	3.7	1.18	.282	4.62	92	3.88	90	9.27	9.9
15	Hideo Nomo H. Nomo	16	2003	LAD	13	.552	33	33	3.09	177	2	2	0	218.1	175	75	82	24	98	1	0	6	897	11	7.30	4.04	1.81	0.99	19.7	10.9	1.25	.253	3.38	77	4.19	98	7.21	2.3
16	Ramon Ortiz R. Ortiz	16	2003	ANA	13	.552	32	32	5.20	94	1	0	0	180.0	209	104	121	28	63	12	0	0	814	4	4.70	3.15	1.49	1.40	11.5	7.7	1.51	.293	6.05	117	5.25	119	10.45	-17
17	Joel Pineiro J. Pineiro	16	2003	SEA	11	.593	32	32	3.78	151	3	2	0	211.2	192	89	94	19	76	6	0	3	890	5	6.42	3.23	1.99	0.81	17.0	8.5	1.27	.271	4.00	88	3.93	90	8.16	10.5
18	Steve Trachsel S. Trachsel	16	2003	NYM	10	.615	33	33	3.78	111	2	2	0	204.2	204	86	90	26	65	3	0	9	857	5	4.88	2.86	1.71	1.14	13.0	7.6	1.31	.273	3.96	91	4.59	108	8.97	-8.1
19	Randy Wolf R. Wolf	16	2003	PHI	10	.615	33	33	4.23	177	2	2	0	200.0	176	94	101	27	78	6	0	4	850	6	7.97	3.51	2.27	1.21	20.8	9.2	1.27	.265	4.55	101	4.27	101	7.92	-0.7
20	Bartolo Colon B. Colon	15	2003	CWS	13	.536	34	34	3.87	173	9	0	0	242.0	223	104	107	30	67	5	0	3	984	8	6.43	2.49	2.58	1.12	17.6	6.8	1.20	.272	3.98	84	4.10	88	8.29	15.5
21	Livan Hernandez L. Hernandez	15	2003	MON	10	.600	33	33	3.20	178	8	0	0	233.1	225	83	92	27	57	10	0	3	967	6	6.87	2.20	3.12	1.04	18.4	5.9	1.21	.285	3.55	73	3.86	87	8.68	14.3
22	Al Leiter A. Leiter	15	2003	NYM	9	.625	30	30	3.99	139	1	1	0	180.2	176	80	83	15	94	9	0	11	798	5	6.92	4.68	1.48	0.75	17.4	11.8	1.49	.298	4.13	96	4.28	101	8.77	-0.7
23	Gil Meche G. Meche	15	2003	SEA	13	.536	32	32	4.59	130	1	0	0	186.1	187	95	97	30	63	3	0	2	785	7	6.28	3.04	2.06	1.45	16.6	8.0	1.34	.281	4.69	107	4.78	109	9.03	-8.9
24	Mark Mulder M. Mulder	15	2003	OAK	9	.625	26	26	3.13	128	9	2	0	186.2	180	65	66	15	40	2	0	2	747	7	6.17	1.93	3.20	0.72	17.1	5.4	1.18	.294	3.18	70	3.37	75	8.68	23.3
25	Jeriome Robertson J. Robertson	15	2003	HOU	9	.625	32	31	5.10	99	0	0	0	160.2	180	91	98	23	64	6	0	8	711	1	5.55	3.59	1.55	1.29	13.9	9.0	1.52	.303	5.49	117	4.96	113	10.08	-10.2