highest k/9 by a pitcher in a season with at least 170 innings pitched

Gerrit Cole has the highest K/9 with 170.0+ innings pitched in a season, with 13.82 per nine innings in 2019.

	NAME	K/9	IP	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	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	212.1	2019	HOU	33	20	5	.800	33	2.50	326	0	0	0	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	186.2	2023	ATL	32	19	5	.792	32	3.86	281	0	0	0	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	Randy Johnson R. Johnson	13.41	249.2	2001	ARI	35	21	6	.778	34	2.49	372	3	2	0	181	69	74	19	71	18	1	2	994	8	2.56	5.24	0.68	37.4	7.1	1.01	.315	2.67	55	2.12	48	6.52	63.9
4	Pedro Martinez P. Martinez	13.20	213.1	1999	BOS	31	23	4	.852	29	2.07	313	5	1	0	160	49	56	9	37	9	1	1	835	6	1.56	8.46	0.38	37.5	4.4	0.92	.323	2.36	42	1.38	30	6.75	79.4
5	Chris Sale C. Sale	12.93	214.1	2017	BOS	32	17	8	.680	32	2.90	308	1	0	0	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	Max Scherzer M. Scherzer	12.69	172.1	2019	WSH	27	11	7	.611	27	2.92	243	0	0	0	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
7	Randy Johnson R. Johnson	12.56	248.2	2000	ARI	35	19	7	.731	35	2.64	347	8	3	0	202	73	89	23	76	6	0	1	1,001	5	2.75	4.57	0.83	34.7	7.6	1.12	.326	3.22	56	2.53	53	7.31	61.1
8	Jose Fernandez J. Fernandez	12.49	182.1	2016	MIA	29	16	8	.667	29	2.86	253	0	0	0	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
9	Gerrit Cole G. Cole	12.40	200.1	2018	HOU	32	15	5	.750	32	2.88	276	1	1	0	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
10	Randy Johnson R. Johnson	12.35	214.1	1995	SEA	30	18	2	.900	30	2.48	294	6	3	0	159	59	65	12	65	6	0	1	866	5	2.73	4.52	0.50	33.9	7.5	1.05	.301	2.73	53	2.08	44	6.68	62
11	Randy Johnson R. Johnson	12.30	213.0	1997	SEA	30	20	4	.833	29	2.28	291	5	2	0	147	54	60	20	77	10	0	2	850	4	3.25	3.78	0.85	34.2	9.1	1.05	.281	2.54	50	2.82	62	6.21	41.3
12	Max Scherzer M. Scherzer	12.24	220.2	2018	WSH	33	18	7	.720	33	2.53	300	2	1	0	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	214.0	2018	HOU	34	16	9	.640	34	2.52	290	1	1	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	Robbie Ray R. Ray	12.13	174.1	2019	ARI	33	12	8	.600	33	4.34	235	0	0	0	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
15	Randy Johnson R. Johnson	12.12	244.1	1998	TOT	34	19	11	.633	34	3.28	329	10	6	0	203	89	102	23	86	14	0	1	1,014	7	3.17	3.83	0.85	32.4	8.5	1.18	.320	3.76	72	2.89	65	7.48	42.2
16	Justin Verlander J. Verlander	12.11	223.0	2019	HOU	34	21	6	.778	34	2.58	300	2	1	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
17	Gerrit Cole G. Cole	12.06	181.1	2021	NYY	30	16	8	.667	30	3.23	243	2	1	0	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
18	Randy Johnson R. Johnson	12.06	271.2	1999	ARI	35	17	9	.654	35	2.48	364	12	2	0	207	75	86	30	70	9	0	3	1,079	4	2.32	5.20	0.99	33.7	6.5	1.02	.292	2.85	53	2.75	59	6.86	57.2
19	Max Scherzer M. Scherzer	12.02	200.2	2017	WSH	31	16	6	.727	31	2.51	268	2	0	0	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	178.0	2022	SFG	31	14	8	.636	31	2.88	237	1	0	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	Yu Darvish Y. Darvish	11.89	209.2	2013	TEX	32	13	9	.591	32	2.83	277	0	0	0	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
22	Max Scherzer M. Scherzer	11.84	179.1	2021	TOT	30	15	4	.789	30	2.46	236	1	0	0	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
23	Chris Sale C. Sale	11.82	208.2	2015	CWS	31	13	11	.542	31	3.41	274	1	0	0	185	79	88	23	42	13	0	0	854	7	1.81	6.52	0.99	32.1	4.9	1.09	.323	3.80	86	2.72	66	7.98	31.8
24	Pedro Martinez P. Martinez	11.78	217.0	2000	BOS	29	18	6	.750	29	1.74	284	7	4	0	128	42	44	17	32	14	0	0	817	1	1.33	8.88	0.71	34.8	3.9	0.74	.236	1.82	35	2.16	47	5.31	61.5
25	Corey Kluber C. Kluber	11.71	203.2	2017	CLE	29	18	4	.818	29	2.25	265	5	3	0	141	51	56	21	36	5	0	2	777	4	1.59	7.36	0.93	34.1	4.6	0.87	.267	2.47	50	2.49	57	6.23	42.8