Jake Arrieta won the most games in 2015, 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	Jake Arrieta J. Arrieta	22	2015	CHC	6	.786	33	33	1.77	236	4	3	0	229.0	150	45	52	10	48	6	0	2	870	6	9.28	1.89	4.92	0.39	27.1	5.5	0.86	.246	2.04	45	2.34	60	5.90	39
2	Dallas Keuchel D. Keuchel	20	2015	HOU	8	.714	33	33	2.48	216	3	2	0	232.0	185	64	68	17	51	2	0	0	911	9	8.38	1.98	4.24	0.66	23.7	5.6	1.02	.269	2.64	64	2.90	73	7.18	28.3
3	Gerrit Cole G. Cole	19	2015	PIT	8	.704	32	32	2.60	202	0	0	0	208.0	183	60	71	11	44	10	0	1	832	7	8.74	1.90	4.59	0.48	24.3	5.3	1.09	.304	3.07	68	2.65	70	7.92	26.9
4	Zack Greinke Z. Greinke	19	2015	LAD	3	.864	32	32	1.66	200	1	0	0	222.2	148	41	43	14	40	5	0	1	843	7	8.08	1.62	5.00	0.57	23.7	4.7	0.84	.229	1.74	44	2.75	73	5.98	26.2
5	Collin McHugh C. McHugh	19	2015	HOU	7	.731	32	32	3.89	171	0	0	0	203.2	207	88	89	19	53	9	0	2	859	5	7.56	2.34	3.23	0.84	19.9	6.2	1.28	.310	3.93	100	3.57	89	9.15	9.5
6	Madison Bumgarner M. Bumgarner	18	2015	SFG	9	.667	32	32	2.93	234	4	2	0	218.1	181	71	73	21	39	7	0	2	869	1	9.65	1.61	6.00	0.87	26.9	4.5	1.01	.282	3.01	78	2.87	78	7.46	20.4
7	Felix Hernandez F. Hernandez	18	2015	SEA	9	.667	31	31	3.53	191	2	2	0	201.2	180	79	80	23	58	9	0	0	826	10	8.52	2.59	3.29	1.03	23.1	7.0	1.18	.288	3.57	92	3.71	94	8.03	5.4
8	David Price D. Price	18	2015	TOT	5	.783	32	32	2.45	225	3	1	0	220.1	190	60	70	17	47	3	0	2	888	4	9.19	1.92	4.79	0.69	25.3	5.3	1.08	.290	2.86	60	2.77	67	7.76	32.3
9	Colby Lewis C. Lewis	17	2015	TEX	9	.654	33	33	4.66	142	2	1	0	204.2	211	106	114	26	42	11	0	2	861	5	6.24	1.85	3.38	1.14	16.5	4.9	1.24	.289	5.01	111	4.17	101	9.28	-1
10	Michael Wacha M. Wacha	17	2015	STL	7	.708	30	30	3.38	153	0	0	0	181.1	162	68	74	19	58	6	0	4	762	4	7.59	2.88	2.64	0.94	20.1	7.6	1.21	.272	3.67	89	3.86	101	8.04	-0.6
11	Clayton Kershaw C. Kershaw	16	2015	LAD	7	.696	33	33	2.13	301	4	3	0	232.2	163	55	62	15	42	5	0	1	890	9	11.64	1.62	7.17	0.58	33.8	4.7	0.88	.281	2.40	57	1.98	52	6.31	47.7
12	Mark Buehrle M. Buehrle	15	2015	TOR	8	.652	32	32	3.81	91	4	1	0	198.2	214	84	100	22	33	7	0	4	827	0	4.12	1.49	2.76	1.00	11.0	4.0	1.24	.285	4.53	94	4.25	104	9.69	-3.8
13	Garrett Richards G. Richards	15	2015	LAA	12	.556	32	32	3.65	176	1	1	0	207.1	181	84	94	20	76	5	0	2	865	17	7.64	3.30	2.32	0.87	20.3	8.8	1.24	.274	4.08	94	3.86	97	7.86	2.2
14	Carlos Carrasco C. Carrasco	14	2015	CLE	12	.538	30	30	3.63	216	3	1	0	183.2	154	74	75	18	43	5	0	2	730	5	10.58	2.11	5.02	0.88	29.6	5.9	1.07	.304	3.68	89	2.83	70	7.55	24.5
15	Bartolo Colon B. Colon	14	2015	NYM	13	.519	33	31	4.16	136	1	1	0	194.2	217	90	94	25	24	4	1	5	815	0	6.29	1.11	5.67	1.16	16.7	2.9	1.24	.307	4.35	112	3.83	99	10.03	1
16	Rubby De La Rosa R. De La Rosa	14	2015	ARI	9	.609	32	32	4.67	150	0	0	0	188.2	193	98	103	32	63	4	0	3	809	2	7.16	3.01	2.38	1.53	18.5	7.8	1.36	.288	4.91	114	4.81	123	9.21	-18.5
17	Jacob deGrom J. deGrom	14	2015	NYM	8	.636	30	30	2.54	205	0	0	0	191.0	149	54	59	16	38	2	0	2	751	6	9.66	1.79	5.39	0.75	27.3	5.1	0.98	.271	2.78	69	2.70	70	7.02	25
18	Nathan Eovaldi N. Eovaldi	14	2015	NYY	3	.824	27	27	4.20	121	0	0	0	154.1	175	72	72	10	49	3	0	0	673	8	7.06	2.86	2.47	0.58	18.0	7.3	1.45	.337	4.20	104	3.41	81	10.21	13.1
19	Sonny Gray S. Gray	14	2015	OAK	7	.667	31	31	2.73	169	3	2	0	208.0	166	63	71	17	59	2	0	0	831	13	7.31	2.55	2.86	0.74	20.3	7.1	1.08	.255	3.07	69	3.44	87	7.18	11.9
20	Carlos Martinez C. Martinez	14	2015	STL	7	.667	31	29	3.01	184	0	0	0	179.2	168	60	65	13	63	8	1	5	755	8	9.22	3.16	2.92	0.65	24.4	8.3	1.29	.318	3.26	79	3.20	84	8.42	12.7
21	Danny Salazar D. Salazar	14	2015	CLE	10	.583	30	30	3.45	195	0	0	0	185.0	156	71	79	23	53	7	0	1	757	3	9.49	2.58	3.68	1.12	25.8	7.0	1.13	.278	3.84	85	3.61	89	7.59	8.8
22	Max Scherzer M. Scherzer	14	2015	WSH	12	.538	33	33	2.79	276	4	3	0	228.2	176	71	74	27	34	5	0	2	899	10	10.86	1.34	8.12	1.06	30.7	3.8	0.92	.268	2.91	71	2.76	72	6.93	27.6
23	Marco Estrada M. Estrada	13	2015	TOR	8	.619	34	28	3.13	131	0	0	0	181.0	134	63	67	24	55	5	3	2	725	2	6.51	2.73	2.38	1.19	18.1	7.6	1.04	.216	3.33	77	4.40	108	6.66	-6.4
24	Yovani Gallardo Y. Gallardo	13	2015	TEX	11	.542	33	33	3.42	121	0	0	0	184.1	193	70	76	15	68	1	0	0	793	10	5.91	3.32	1.78	0.73	15.3	8.6	1.42	.303	3.71	81	3.99	97	9.42	2.6
25	Cole Hamels C. Hamels	13	2015	TOT	8	.619	32	32	3.65	215	2	1	0	212.1	190	86	88	22	62	10	0	3	880	9	9.11	2.63	3.47	0.93	24.4	7.0	1.19	.294	3.73	91	3.47	86	8.05	13.4