Sandy Koufax and Juan Marichal were tied for winning the most games in 1963, with 25 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	Sandy Koufax S. Koufax	25	1963	LAD	5	.833	40	40	1.88	306	20	11	0	311.0	214	65	68	18	58	3	0	7	1,210	6	8.86	1.68	5.28	0.52	25.3	4.8	0.87	.238	1.97	62	1.85	62	6.19	41.9
2	Juan Marichal J. Marichal	25	1963	SFG	8	.758	41	40	2.41	248	18	5	0	321.1	259	86	102	27	61	2	1	6	1,270	2	6.95	1.71	4.07	0.76	19.5	4.8	1.00	.249	2.86	73	2.62	80	7.25	23.3
3	Whitey Ford W. Ford	24	1963	NYY	7	.774	38	37	2.74	189	13	3	1	269.1	240	82	94	26	56	2	1	3	1,068	9	6.32	1.87	3.38	0.87	17.7	5.2	1.10	.269	3.14	78	2.98	84	8.02	16.9
4	Jim Maloney J. Maloney	23	1963	CIN	7	.767	33	33	2.77	265	13	6	0	250.1	183	77	84	17	88	6	0	1	1,010	19	9.53	3.16	3.01	0.61	26.2	8.7	1.08	.262	3.02	83	2.37	71	6.58	26.5
5	Warren Spahn W. Spahn	23	1963	MIL	7	.767	33	33	2.60	102	22	7	0	259.2	241	75	85	23	49	0	0	4	1,037	4	3.54	1.70	2.08	0.80	9.8	4.7	1.12	.253	2.95	81	3.41	106	8.35	-6.4
6	Dick Ellsworth D. Ellsworth	22	1963	CHC	10	.688	37	37	2.11	185	19	4	0	290.2	223	68	75	14	75	2	0	7	1,160	3	5.73	2.32	2.47	0.43	15.9	6.5	1.03	.236	2.32	62	2.63	77	6.90	24.6
7	Jim Bouton J. Bouton	21	1963	NYY	7	.750	40	30	2.53	148	12	6	1	249.1	191	70	79	18	87	3	4	2	1,004	4	5.34	3.14	1.70	0.65	14.7	8.7	1.11	.231	2.85	72	3.31	94	6.89	6
8	Camilo Pascual C. Pascual	21	1963	MIN	9	.700	31	31	2.46	202	18	3	0	248.1	205	68	76	21	81	3	0	4	1,011	10	7.32	2.94	2.49	0.76	20.0	8.0	1.15	.261	2.75	67	2.97	80	7.43	20.7
9	Steve Barber S. Barber	20	1963	BAL	13	.606	39	36	2.75	180	11	2	0	258.2	253	79	99	12	92	4	1	10	1,096	3	6.26	3.20	1.96	0.42	16.4	8.4	1.33	.298	3.44	79	2.80	80	8.80	20.3
10	Bill Monbouquette B. Monbouquette	20	1963	BOS	10	.667	37	36	3.81	174	13	1	0	266.2	258	113	119	31	42	0	1	6	1,090	3	5.87	1.42	4.14	1.05	16.0	3.9	1.13	.269	4.02	100	3.16	82	8.71	19.7
11	Don Drysdale D. Drysdale	19	1963	LAD	17	.528	42	42	2.63	251	17	3	0	315.1	287	92	114	25	57	10	0	13	1,266	4	7.16	1.63	4.40	0.71	19.8	4.5	1.09	.284	3.25	87	2.56	85	8.19	15.7
12	Gary Peters G. Peters	19	1963	CWS	8	.704	41	30	2.33	189	13	4	1	243.0	192	63	69	9	68	8	4	2	978	5	7.00	2.52	2.78	0.33	19.3	7.0	1.07	.260	2.56	67	2.34	67	7.11	32.1
13	Ernie Broglio E. Broglio	18	1963	STL	8	.692	39	35	2.99	145	11	5	0	250.0	202	83	97	24	90	4	3	4	1,041	13	5.22	3.24	1.61	0.86	13.9	8.6	1.17	.229	3.49	84	3.70	105	7.27	-3.2
14	Bob Gibson B. Gibson	18	1963	STL	9	.667	36	33	3.39	204	14	2	0	254.2	224	96	110	19	96	13	2	1	1,088	6	7.21	3.39	2.13	0.67	18.8	8.8	1.26	.271	3.89	96	3.13	89	7.92	11.5
15	Bob Friend B. Friend	17	1963	PIT	16	.515	39	38	2.34	144	12	4	0	268.2	236	70	87	13	44	5	1	9	1,080	6	4.82	1.47	3.27	0.44	13.3	4.1	1.04	.255	2.91	72	2.58	80	7.91	19.6
16	Jim O'Toole J. O'Toole	17	1963	CIN	14	.548	33	32	2.88	146	12	5	0	234.1	208	75	85	13	57	3	0	4	955	8	5.61	2.19	2.56	0.50	15.3	6.0	1.13	.265	3.26	86	2.72	82	7.99	15.9
17	Ralph Terry R. Terry	17	1963	NYY	15	.531	40	37	3.22	114	18	3	1	268.0	246	96	103	29	39	4	2	1	1,074	1	3.83	1.31	2.92	0.97	10.6	3.6	1.06	.244	3.46	92	3.52	99	8.26	0.2
18	Milt Pappas M. Pappas	16	1963	BAL	9	.640	34	32	3.03	120	11	4	0	216.2	186	73	80	21	69	5	1	6	888	10	4.98	2.87	1.74	0.87	13.5	7.8	1.18	.245	3.32	87	3.66	104	7.73	-4.3
19	Ron Perranoski R. Perranoski	16	1963	LAD	3	.842	69	0	1.67	75	0	0	21	129.0	112	24	30	7	43	4	47	14	541	4	5.23	3.00	1.74	0.49	13.9	7.9	1.20	.255	2.09	55	3.11	104	7.81	-2.3
20	Juan Pizarro J. Pizarro	16	1963	CWS	8	.667	32	28	2.39	163	10	3	1	214.2	177	57	69	14	63	3	3	1	874	5	6.83	2.64	2.59	0.59	18.6	7.2	1.12	.258	2.89	69	2.73	78	7.42	18.7
21	Jack Sanford J. Sanford	16	1963	SFG	13	.552	42	42	3.51	158	11	0	0	284.1	273	111	123	21	76	5	0	8	1,184	4	5.00	2.41	2.08	0.66	13.3	6.4	1.23	.273	3.89	107	3.18	97	8.64	2.7
22	Joe Nuxhall J. Nuxhall	15	1963	CIN	8	.652	35	29	2.61	169	14	2	2	217.1	194	63	73	14	39	6	5	2	878	2	7.00	1.62	4.33	0.58	19.2	4.4	1.07	.277	3.02	78	2.38	71	8.03	22.8
23	Dick Radatz D. Radatz	15	1963	BOS	6	.714	66	0	1.97	162	0	0	23	132.1	94	29	31	9	51	5	58	13	541	5	11.02	3.47	3.18	0.61	29.9	9.4	1.10	.271	2.11	52	2.18	57	6.39	23.4
24	Phil Regan P. Regan	15	1963	DET	9	.625	38	27	3.86	115	5	1	1	189.0	179	81	95	33	59	7	5	5	811	6	5.48	2.81	1.95	1.57	14.2	7.3	1.26	.245	4.52	105	4.58	124	8.52	-18.5
25	Curt Simmons C. Simmons	15	1963	STL	9	.625	32	32	2.48	127	11	6	0	232.2	209	64	82	13	48	6	0	3	942	3	4.91	1.86	2.65	0.50	13.5	5.1	1.10	.262	3.17	70	2.81	80	8.08	18.2