Since 2000, Spencer Strider has the highest K/9, with 12.38 per nine innings.

Interpreted as:

best k / 9 with a minimum of 0.5 IP per team game by a player since 2000

	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	Spencer Strider S. Strider	12.38	90	38	24	.613	77	3.74	626	0	0	0	455.0	368	189	198	52	160	20	3	2	1,881	13	3.16	3.91	1.03	33.3	8.5	1.16	.309	3.92	87	3.09	75	7.28	52.1
2	Garrett Crochet G. Crochet	11.64	136	27	24	.529	64	2.95	549	1	1	0	424.1	345	139	151	45	119	11	18	2	1,725	15	2.52	4.61	0.95	31.8	6.9	1.09	.300	3.20	70	2.86	67	7.32	64.7
3	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
4	Hunter Greene H. Greene	11.20	91	25	29	.463	91	3.65	617	2	2	0	495.2	386	201	211	70	179	39	0	0	2,060	21	3.25	3.45	1.27	30.0	8.7	1.14	.274	3.83	82	3.83	88	7.01	29.1
5	Blake Snell B. Snell	11.19	222	81	62	.566	222	3.15	1,440	1	1	0	1158.0	891	405	440	111	521	11	0	6	4,791	86	4.05	2.76	0.86	30.1	10.9	1.22	.288	3.42	77	3.31	79	6.92	111.7
6	Freddy Peralta F. Peralta	11.15	211	70	42	.625	162	3.59	1,153	1	0	1	931.0	694	371	392	118	360	48	6	3	3,853	31	3.48	3.20	1.14	29.9	9.3	1.13	.265	3.79	85	3.66	87	6.71	59.2
7	Chris Sale C. Sale	11.14	393	145	88	.622	312	3.01	2,579	16	3	12	2084.0	1,692	697	750	213	487	130	25	15	8,389	48	2.10	5.30	0.92	30.7	5.8	1.05	.297	3.24	70	2.87	68	7.31	303.3
8	Dylan Cease D. Cease	10.91	188	65	58	.528	188	3.88	1,231	3	3	0	1015.1	854	438	482	121	430	35	0	9	4,304	55	3.81	2.86	1.07	28.6	10.0	1.26	.295	4.27	93	3.66	85	7.57	67.6
9	Paul Skenes P. Skenes	10.83	55	21	13	.618	55	1.96	386	1	0	0	320.2	230	70	76	21	74	12	0	0	1,247	4	2.08	5.22	0.59	31.0	5.9	0.95	.277	2.13	46	2.39	58	6.46	61
10	Robbie Ray R. Ray	10.83	265	88	81	.521	261	3.94	1,734	2	1	0	1441.0	1,250	631	674	216	608	51	1	19	6,097	60	3.80	2.85	1.35	28.4	10.0	1.29	.296	4.21	94	4.06	99	7.81	5.1
11	Jacob deGrom J. deGrom	10.82	248	96	65	.596	248	2.57	1,851	4	2	0	1539.2	1,173	440	477	146	345	25	0	13	6,045	30	2.02	5.37	0.85	30.6	5.7	0.99	.279	2.79	66	2.70	66	6.86	239.4
12	Cole Ragans C. Ragans	10.80	83	21	20	.512	66	3.66	461	1	0	0	384.0	312	156	168	35	144	10	1	2	1,585	22	3.38	3.20	0.82	29.1	9.1	1.19	.296	3.94	86	3.16	76	7.31	42.6
13	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
14	Max Scherzer M. Scherzer	10.60	483	220	117	.653	474	3.22	3,489	12	5	0	2963.0	2,433	1,059	1,132	354	779	114	2	20	11,987	80	2.37	4.48	1.08	29.1	6.5	1.08	.287	3.44	77	3.23	78	7.39	302.5
15	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
16	Brandon Woodruff B. Woodruff	10.52	142	53	28	.654	127	3.10	871	2	1	1	745.0	580	257	269	84	190	32	4	1	2,984	8	2.30	4.58	1.01	29.2	6.4	1.03	.274	3.25	73	3.18	75	7.01	89
17	Yu Darvish Y. Darvish	10.50	297	115	93	.553	297	3.65	2,075	2	1	0	1778.0	1,460	721	756	231	563	83	0	8	7,305	83	2.85	3.69	1.17	28.4	7.7	1.14	.282	3.83	87	3.58	85	7.39	120
18	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
19	Yoshinobu Yamamoto Y. Yamamoto	10.45	48	19	10	.655	48	2.66	306	0	0	0	263.2	191	78	85	21	81	4	0	0	1,052	7	2.76	3.78	0.72	29.1	7.7	1.03	.266	2.90	65	2.82	67	6.52	39.5
20	Tarik Skubal T. Skubal	10.44	137	54	37	.593	134	3.08	889	1	1	0	766.2	614	262	287	90	172	26	1	0	3,056	11	2.02	5.17	1.06	29.1	5.6	1.03	.279	3.37	75	3.14	76	7.21	84
21	Randy Johnson R. Johnson	10.42	287	143	78	.647	281	3.34	2,182	32	12	0	1885.1	1,616	699	790	212	484	89	3	22	7,686	34	2.31	4.51	1.01	28.4	6.3	1.11	.298	3.77	75	3.12	70	7.71	275.2
22	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
23	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
24	Corbin Burnes C. Burnes	10.36	210	63	38	.624	149	3.15	1,114	0	0	2	968.0	756	339	374	104	280	38	16	3	3,914	42	2.60	3.98	0.97	28.5	7.2	1.07	.274	3.48	75	3.25	78	7.03	100.7
25	Eury Pérez E. Pérez	10.27	39	12	12	.500	39	3.71	213	0	0	0	186.2	140	77	82	27	63	5	0	0	759	15	3.04	3.38	1.30	28.1	8.3	1.09	.251	3.95	85	3.88	91	6.75	7.7