highest k/9 in a single season by a pitcher with 25+ starts since 2005

Since 2005, Gerrit Cole has the highest K/9 with 25+ starts in a season, with 13.82 per nine innings in 2019.

	NAME	K/9	GS	SEASON	TM	G	W	L	W%	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Gerrit Cole G. Cole	13.82	33	2019	HOU	33	20	5	.800	2.50	326	0	0	0	212.1	142	59	66	29	48	3	0	0	817	4	2.03	6.79	1.23	39.9	5.9	0.89	.275	2.80	55	2.63	58	6.02	45
2	Spencer Strider S. Strider	13.55	32	2023	ATL	32	19	5	.792	3.86	281	0	0	0	186.2	146	80	85	22	58	9	0	1	763	6	2.80	4.84	1.06	36.8	7.6	1.09	.316	4.10	87	2.85	66	7.04	30.3
3	Chris Sale C. Sale	13.50	27	2018	BOS	27	12	4	.750	2.11	237	0	0	0	158.0	102	37	39	11	34	14	0	0	617	4	1.94	6.97	0.63	38.4	5.5	0.86	.283	2.22	48	1.97	47	5.81	39.2
4	Chris Sale C. Sale	13.32	25	2019	BOS	25	6	11	.353	4.40	218	1	1	0	147.1	123	72	80	24	37	13	0	0	612	2	2.26	5.89	1.47	35.6	6.0	1.09	.309	4.89	91	3.38	75	7.51	18.8
5	Chris Sale C. Sale	12.93	32	2017	BOS	32	17	8	.680	2.90	308	1	0	0	214.1	165	69	73	24	43	8	0	0	851	3	1.81	7.16	1.01	36.2	5.1	0.97	.301	3.07	63	2.45	56	6.93	45.5
6	Garrett Crochet G. Crochet	12.88	32	2024	CWS	32	6	12	.333	3.58	209	0	0	0	146.0	123	58	61	18	33	5	0	0	595	3	2.03	6.33	1.11	35.1	5.5	1.07	.318	3.76	88	2.68	64	7.58	24.3
7	Max Scherzer M. Scherzer	12.69	27	2019	WSH	27	11	7	.611	2.92	243	0	0	0	172.1	144	56	59	18	33	7	0	2	693	0	1.72	7.36	0.94	35.1	4.8	1.03	.321	3.08	66	2.44	55	7.52	38.6
8	Corbin Burnes C. Burnes	12.61	28	2021	MIL	28	11	5	.688	2.43	234	0	0	0	167.0	123	45	47	7	34	6	0	0	657	5	1.83	6.88	0.38	35.6	5.2	0.94	.309	2.53	58	1.62	38	6.63	48.9
9	Jose Fernandez J. Fernandez	12.49	29	2016	MIA	29	16	8	.667	2.86	253	0	0	0	182.1	149	58	63	13	55	6	0	6	737	9	2.71	4.60	0.64	34.3	7.5	1.12	.332	3.11	72	2.29	57	7.35	35.4
10	Gerrit Cole G. Cole	12.40	32	2018	HOU	32	15	5	.750	2.88	276	1	1	0	200.1	143	64	68	19	64	7	0	0	799	9	2.88	4.31	0.85	34.5	8.0	1.03	.286	3.05	70	2.70	65	6.42	32.7
11	Dylan Cease D. Cease	12.28	32	2021	CWS	32	13	7	.650	3.91	226	1	1	0	165.2	139	72	77	20	68	9	0	0	708	13	3.69	3.32	1.09	31.9	9.6	1.25	.309	4.18	90	3.40	76	7.55	18.9
12	Max Scherzer M. Scherzer	12.24	33	2018	WSH	33	18	7	.720	2.53	300	2	1	0	220.2	150	62	66	23	51	12	0	4	866	4	2.08	5.88	0.94	34.6	5.9	0.91	.265	2.69	62	2.65	64	6.12	36.1
13	Justin Verlander J. Verlander	12.20	34	2018	HOU	34	16	9	.640	2.52	290	1	1	0	214.0	156	60	63	28	37	8	0	0	833	5	1.56	7.84	1.18	34.8	4.4	0.90	.272	2.65	62	2.78	67	6.56	33
14	Freddy Peralta F. Peralta	12.16	27	2021	MIL	28	10	5	.667	2.81	195	1	0	0	144.1	84	45	47	14	56	11	0	1	580	4	3.49	3.48	0.87	33.6	9.7	0.97	.230	2.93	67	3.11	73	5.24	18.6
15	Robbie Ray R. Ray	12.13	33	2019	ARI	33	12	8	.600	4.34	235	0	0	0	174.1	150	84	91	30	84	5	0	5	747	7	4.34	2.80	1.55	31.5	11.2	1.34	.305	4.70	98	4.28	99	7.74	1
16	Robbie Ray R. Ray	12.11	28	2017	ARI	28	15	5	.750	2.89	218	1	1	0	162.0	116	52	57	23	71	5	0	3	665	8	3.94	3.07	1.28	32.8	10.7	1.15	.267	3.17	63	3.71	85	6.44	11.6
17	Justin Verlander J. Verlander	12.11	34	2019	HOU	34	21	6	.778	2.58	300	2	1	0	223.0	137	64	66	36	42	6	0	0	847	4	1.70	7.14	1.45	35.4	5.0	0.80	.218	2.66	57	3.26	72	5.53	31.5
18	Gerrit Cole G. Cole	12.06	30	2021	NYY	30	16	8	.667	3.23	243	2	1	0	181.1	151	65	69	24	41	2	0	0	726	5	2.03	5.93	1.19	33.5	5.6	1.06	.305	3.42	76	2.91	67	7.49	28.1
19	Max Scherzer M. Scherzer	12.02	31	2017	WSH	31	16	6	.727	2.51	268	2	0	0	200.2	126	56	62	22	55	11	0	2	780	4	2.47	4.87	0.99	34.4	7.1	0.90	.245	2.78	57	2.89	66	5.65	33.2
20	Carlos Rodón C. Rodón	11.98	31	2022	SFG	31	14	8	.636	2.88	237	1	0	0	178.0	131	57	59	12	52	3	0	0	710	10	2.63	4.56	0.61	33.4	7.3	1.03	.293	2.98	74	2.25	59	6.62	32.2
21	Blake Snell B. Snell	11.89	27	2021	SDP	27	7	6	.538	4.20	170	0	0	0	128.2	101	60	61	16	69	3	0	1	550	7	4.83	2.46	1.12	30.9	12.5	1.32	.291	4.27	106	3.82	91	7.06	5.5
22	Yu Darvish Y. Darvish	11.89	32	2013	TEX	32	13	9	.591	2.83	277	0	0	0	209.2	145	66	68	26	80	8	0	1	841	7	3.43	3.46	1.12	32.9	9.5	1.07	.264	2.92	67	3.27	80	6.22	18.5
23	Logan Gilbert L. Gilbert	11.89	25	2025	SEA	25	6	6	.500	3.44	173	0	0	0	131.0	104	50	53	20	31	7	0	0	535	10	2.13	5.58	1.37	32.3	5.8	1.03	.276	3.64	89	3.34	83	7.15	9.8
24	Shohei Ohtani S. Ohtani	11.87	28	2022	LAA	28	15	9	.625	2.33	219	0	0	0	166.0	124	43	45	14	44	2	0	0	660	14	2.39	4.98	0.76	33.2	6.7	1.01	.289	2.44	59	2.40	60	6.72	29.5
25	Max Scherzer M. Scherzer	11.84	30	2021	TOT	30	15	4	.789	2.46	236	1	0	0	179.1	119	49	53	23	36	10	0	0	693	2	1.81	6.56	1.15	34.1	5.2	0.86	.247	2.66	59	2.97	69	5.97	26