most k / 9 by a pitcher in a season since 1920 with at least 200 ip

Since 1920, Gerrit Cole has the best K/9 with 200.0+ 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	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
3	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
4	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
5	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
6	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
7	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
8	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
9	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
10	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
11	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
12	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
13	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
14	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
15	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
16	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
17	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
18	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
19	Clayton Kershaw C. Kershaw	11.64	232.2	2015	LAD	33	16	7	.696	33	2.13	301	4	3	0	163	55	62	15	42	5	0	1	890	9	1.62	7.17	0.58	33.8	4.7	0.88	.281	2.40	57	1.98	52	6.31	47.7
20	Randy Johnson R. Johnson	11.56	260.0	2002	ARI	35	24	5	.828	35	2.32	334	8	4	0	197	67	78	26	71	13	0	1	1,035	3	2.46	4.70	0.90	32.3	6.9	1.03	.289	2.70	54	2.65	61	6.82	47
21	Gerrit Cole G. Cole	11.53	200.2	2022	NYY	33	13	8	.619	33	3.50	257	0	0	0	154	78	81	33	50	2	0	0	793	2	2.24	5.14	1.48	32.4	6.3	1.02	.268	3.63	92	3.46	87	6.91	11.5
22	Nolan Ryan N. Ryan	11.48	211.2	1987	HOU	34	8	16	.333	34	2.76	270	0	0	0	154	65	75	14	87	4	0	2	873	10	3.70	3.10	0.60	30.9	10.0	1.14	.281	3.19	70	2.46	63	6.55	34.5
23	Dwight Gooden D. Gooden	11.39	218.0	1984	NYM	31	17	9	.654	31	2.60	276	7	3	0	161	63	72	7	73	2	0	2	879	3	3.01	3.78	0.29	31.4	8.3	1.07	.296	2.97	74	1.68	48	6.65	44.6
24	Pedro Martinez P. Martinez	11.37	241.1	1997	MON	31	17	8	.680	31	1.90	305	13	4	0	158	51	65	16	67	9	0	5	947	3	2.50	4.55	0.60	32.2	7.1	0.93	.258	2.42	45	2.38	57	5.89	49
25	Kerry Wood K. Wood	11.35	211.0	2003	CHC	32	14	11	.560	32	3.20	266	4	2	0	152	75	77	24	100	21	0	2	887	10	4.27	2.66	1.02	30.0	11.3	1.19	.269	3.28	75	3.70	85	6.48	15.8