Jake Arrieta and Dallas Keuchel were tied for the most decisions in 2015, with 28 decisions.

	NAME	DEC	SEASON	TM	G	W	L	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	Jake Arrieta J. Arrieta	28	2015	CHC	33	22	6	.786	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	28	2015	HOU	33	20	8	.714	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	Madison Bumgarner M. Bumgarner	27	2015	SFG	32	18	9	.667	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
4	Gerrit Cole G. Cole	27	2015	PIT	32	19	8	.704	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
5	Bartolo Colon B. Colon	27	2015	NYM	33	14	13	.519	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
6	Felix Hernandez F. Hernandez	27	2015	SEA	31	18	9	.667	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
7	Garrett Richards G. Richards	27	2015	LAA	32	15	12	.556	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
8	Carlos Carrasco C. Carrasco	26	2015	CLE	30	14	12	.538	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
9	Colby Lewis C. Lewis	26	2015	TEX	33	17	9	.654	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	Collin McHugh C. McHugh	26	2015	HOU	32	19	7	.731	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
11	Max Scherzer M. Scherzer	26	2015	WSH	33	14	12	.538	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
12	Chris Archer C. Archer	25	2015	TBR	34	12	13	.480	34	3.23	252	1	1	0	212.0	175	76	85	19	66	3	0	0	868	13	10.70	2.80	3.82	0.81	29.0	7.6	1.14	.295	3.61	83	2.89	73	7.43	25.4
13	Corey Kluber C. Kluber	25	2015	CLE	32	9	16	.360	32	3.49	245	4	0	0	222.0	189	86	92	22	45	11	0	3	886	6	9.93	1.82	5.44	0.89	27.7	5.1	1.05	.297	3.73	85	2.96	73	7.66	26.4
14	Tom Koehler T. Koehler	25	2015	MIA	32	11	14	.440	31	4.08	137	0	0	0	187.1	180	85	96	22	77	6	0	3	800	2	6.58	3.70	1.78	1.06	17.1	9.6	1.37	.283	4.61	108	4.52	120	8.65	-16.5
15	Alfredo Simon A. Simon	25	2015	DET	31	13	12	.520	31	5.05	117	2	1	0	187.0	201	105	112	24	68	8	0	1	820	14	5.63	3.27	1.72	1.16	14.3	8.3	1.44	.294	5.39	124	4.76	116	9.67	-13.1
16	Johnny Cueto J. Cueto	24	2015	TOT	32	11	13	.458	32	3.44	176	2	2	0	212.0	194	81	87	21	46	8	0	1	866	0	7.47	1.95	3.83	0.89	20.3	5.3	1.13	.281	3.69	86	3.52	89	8.24	10
17	Yovani Gallardo Y. Gallardo	24	2015	TEX	33	13	11	.542	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
18	Ian Kennedy I. Kennedy	24	2015	SDP	30	9	15	.375	30	4.28	174	0	0	0	168.1	166	80	95	31	52	7	0	4	713	5	9.30	2.78	3.35	1.66	24.4	7.3	1.30	.301	5.08	115	4.50	119	8.88	-13.6
19	Jimmy Nelson J. Nelson	24	2015	MIL	30	11	13	.458	30	4.11	148	0	0	0	177.1	163	81	89	18	65	13	0	4	752	11	7.51	3.30	2.28	0.91	19.7	8.6	1.29	.285	4.52	103	4.10	103	8.27	-1.8
20	Rick Porcello R. Porcello	24	2015	BOS	28	9	15	.375	28	4.92	149	0	0	0	172.0	196	94	103	25	38	10	0	0	737	12	7.80	1.99	3.92	1.31	20.2	5.2	1.36	.332	5.39	118	4.12	104	10.26	-3.4
21	Danny Salazar D. Salazar	24	2015	CLE	30	14	10	.583	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	Chris Sale C. Sale	24	2015	CWS	31	13	11	.542	31	3.41	274	1	0	0	208.2	185	79	88	23	42	13	0	0	854	7	11.82	1.81	6.52	0.99	32.1	4.9	1.09	.323	3.80	86	2.72	66	7.98	31.8
23	Jeff Samardzija J. Samardzija	24	2015	CWS	32	11	13	.458	32	4.96	163	2	2	0	214.0	228	118	122	29	49	12	0	0	910	5	6.86	2.06	3.33	1.22	17.9	5.4	1.29	.303	5.13	125	4.22	103	9.59	-2.3
24	Michael Wacha M. Wacha	24	2015	STL	30	17	7	.708	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
25	Alex Wood A. Wood	24	2015	TOT	32	12	12	.500	32	3.84	139	0	0	0	189.2	198	81	86	15	59	4	0	4	801	6	6.60	2.80	2.36	0.71	17.4	7.4	1.36	.313	4.08	101	3.69	98	9.40	1.7