Since 1900, Hunter Greene has the best K/9, with 11.28 per nine innings.

Interpreted as:

highest k/9 with a minimum of 0.5 IP per team game by a player since 1900

	NAME	K/9	G	W	L	W%	GS	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	Hunter Greene H. Greene	11.28	79	22	27	.449	79	3.76	540	1	1	0	430.2	338	180	188	62	161	39	0	0	1,805	18	3.36	3.35	1.30	29.9	8.9	1.16	.275	3.93	85	3.91	90	7.06	20.5
2	Jose Fernandez J. Fernandez	11.25	76	38	17	.691	76	2.58	589	0	0	0	471.1	357	135	150	31	140	13	0	12	1,888	16	2.67	4.21	0.59	31.2	7.4	1.05	.292	2.86	68	2.43	64	6.82	73
3	Freddy Peralta F. Peralta	11.23	185	56	38	.596	136	3.73	990	1	0	1	793.2	598	329	349	102	308	40	6	3	3,290	28	3.49	3.21	1.16	30.1	9.4	1.14	.268	3.96	88	3.67	87	6.78	49.9
4	Blake Snell B. Snell	11.17	213	77	58	.570	213	3.18	1,372	1	1	0	1105.2	850	391	426	108	503	11	0	5	4,583	81	4.09	2.73	0.88	29.9	11.0	1.22	.287	3.47	78	3.35	80	6.92	100.8
5	Chris Sale C. Sale	11.11	379	139	86	.618	299	3.07	2,460	16	3	12	1993.2	1,631	680	732	207	464	122	25	15	8,036	47	2.09	5.30	0.93	30.6	5.8	1.05	.298	3.30	72	2.89	69	7.36	286.1
6	Robbie Ray R. Ray	11.03	240	81	73	.526	236	3.96	1,589	1	1	0	1297.0	1,129	570	606	199	556	47	1	19	5,500	54	3.86	2.86	1.38	28.9	10.1	1.30	.299	4.21	94	4.09	100	7.83	2.5
7	Jacob deGrom J. deGrom	10.92	224	85	58	.594	224	2.53	1,699	4	2	0	1400.0	1,077	393	430	125	315	23	0	13	5,505	28	2.03	5.39	0.80	30.9	5.7	0.99	.285	2.76	65	2.61	64	6.92	229.1
8	Jack Dreyer J. Dreyer	10.90	13	2	1	.667	1	3.63	21	0	0	0	17.1	9	7	7	0	10	0	2	0	71	0	5.19	2.10	0.00	29.6	14.1	1.10	.225	3.63	90	2.36	58	4.67	3.2
9	Paul Skenes P. Skenes	10.81	30	14	6	.700	30	2.15	211	0	0	0	175.2	125	42	46	14	40	7	0	0	679	3	2.05	5.28	0.72	31.1	5.9	0.94	.273	2.36	51	2.57	64	6.40	28.7
10	Dylan Cease D. Cease	10.78	163	58	48	.547	163	3.82	1,055	3	3	0	881.0	741	374	414	103	374	31	0	8	3,736	50	3.82	2.82	1.05	28.2	10.0	1.27	.294	4.23	91	3.67	85	7.57	59.9
11	DJ Herz	10.76	19	4	9	.308	19	4.16	106	0	0	0	88.2	76	41	45	11	36	3	0	0	382	5	3.65	2.94	1.12	27.7	9.4	1.26	.288	4.57	102	3.70	90	7.71	3.9
12	Yoshinobu Yamamoto Y. Yamamoto	10.66	25	11	4	.733	25	2.35	154	0	0	0	130.0	102	34	39	9	35	1	0	0	521	3	2.42	4.40	0.62	29.6	6.7	1.05	.289	2.70	58	2.49	60	7.06	23.2
13	Kodai Senga K. Senga	10.66	36	16	9	.640	36	2.73	242	0	0	0	204.1	154	62	69	19	90	7	0	0	844	15	3.96	2.69	0.84	28.7	10.7	1.19	.278	3.04	65	3.48	82	6.78	17.8
14	Max Scherzer M. Scherzer	10.65	467	215	112	.657	458	3.16	3,408	12	5	0	2881.0	2,349	1,012	1,085	337	756	112	2	20	11,640	78	2.36	4.51	1.05	29.3	6.5	1.08	.286	3.39	76	3.18	77	7.34	307.8
15	Eury Pérez E. Pérez	10.64	19	5	6	.455	19	3.15	108	0	0	0	91.1	72	32	35	15	31	2	0	0	374	6	3.05	3.48	1.48	28.9	8.3	1.13	.261	3.45	71	4.11	94	7.09	2.7
16	Randy Johnson R. Johnson	10.61	618	303	166	.646	603	3.29	4,875	100	37	2	4135.1	3,346	1,513	1,703	411	1,497	190	7	37	17,067	109	3.26	3.26	0.89	28.6	8.8	1.17	.291	3.71	75	3.18	73	7.28	554.3
17	Yu Darvish Y. Darvish	10.59	282	110	88	.556	282	3.58	2,007	2	1	0	1706.0	1,394	678	712	217	544	77	0	8	7,009	79	2.87	3.69	1.14	28.6	7.8	1.14	.283	3.76	85	3.53	84	7.35	125.8
18	Stephen Strasburg S. Strasburg	10.55	247	113	62	.646	247	3.24	1,723	2	2	0	1470.0	1,217	530	582	149	394	53	0	20	5,962	44	2.41	4.37	0.91	28.9	6.6	1.10	.293	3.56	80	3.01	75	7.45	165.9
19	Danny Salazar D. Salazar	10.47	109	38	34	.528	105	3.82	688	1	1	0	591.1	536	251	268	75	213	15	3	8	2,482	24	3.24	3.23	1.14	27.7	8.6	1.27	.309	4.08	91	3.61	88	8.16	33.1
20	Cole Ragans C. Ragans	10.43	76	19	18	.514	59	3.54	409	1	0	0	353.0	286	139	151	32	133	9	1	2	1,456	21	3.39	3.08	0.82	28.1	9.1	1.19	.291	3.85	84	3.24	78	7.29	35.6
21	Brandon Woodruff B. Woodruff	10.42	130	46	26	.639	115	3.10	788	2	1	1	680.1	535	234	243	75	176	29	4	1	2,727	7	2.33	4.48	0.99	28.9	6.5	1.05	.277	3.21	73	3.19	75	7.08	81.7
22	Spencer Arrighetti S. Arrighetti	10.42	31	8	14	.364	30	4.60	179	0	0	0	154.2	143	79	86	22	70	8	0	0	671	3	4.07	2.56	1.28	26.7	10.4	1.38	.309	5.00	116	4.20	104	8.32	-2.8
23	Corbin Burnes C. Burnes	10.37	205	61	37	.622	144	3.20	1,079	0	0	2	936.1	735	333	368	102	271	37	16	2	3,789	42	2.60	3.98	0.98	28.5	7.2	1.07	.275	3.54	76	3.27	78	7.06	95.7
24	Mark Prior M. Prior	10.37	106	42	29	.592	106	3.51	757	5	1	0	657.0	582	256	277	77	223	31	0	10	2,771	21	3.05	3.39	1.05	27.3	8.0	1.23	.300	3.79	81	3.40	78	7.97	70.6
25	Gerrit Cole G. Cole	10.37	317	153	80	.657	317	3.18	2,251	8	5	0	1954.0	1,627	690	740	217	500	61	0	8	7,861	58	2.30	4.50	1.00	28.6	6.4	1.09	.292	3.41	79	3.16	77	7.49	213.5