Since 2020, Spencer Strider has the highest K/9 when pitching at least 400 innings, with 12.87 per nine innings.

Interpreted as:

best k/9 by a player since 2020, minimum 400 ip

	NAME	K/9	IP	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	Spencer Strider S. Strider	12.87	416.0	83	36	20	.643	70	3.72	595	0	0	0	326	172	181	47	144	18	3	2	1,714	13	3.12	4.13	1.02	34.7	8.4	1.13	.307	3.92	87	2.95	72	7.05	54.4
2	Jacob deGrom J. deGrom	12.40	405.2	71	28	13	.683	71	2.33	559	1	1	0	257	105	113	44	72	5	0	0	1,533	6	1.60	7.76	0.98	36.5	4.7	0.81	.250	2.51	58	2.37	56	5.70	83.3
3	Tyler Glasnow T. Glasnow	12.13	458.2	81	30	17	.638	81	3.34	618	0	0	0	319	170	177	58	150	2	0	0	1,825	43	2.94	4.12	1.14	33.9	8.2	1.02	.262	3.47	81	3.12	75	6.26	53
4	Blake Snell B. Snell	11.88	609.2	118	40	31	.563	118	3.13	805	1	1	0	444	212	226	60	292	9	0	1	2,535	44	4.31	2.76	0.89	31.8	11.5	1.21	.280	3.34	78	3.30	79	6.55	57.6
5	Shohei Ohtani S. Ohtani	11.46	453.1	85	34	17	.667	85	3.00	577	1	1	0	331	151	159	49	156	23	0	2	1,836	43	3.10	3.70	0.97	31.4	8.5	1.07	.274	3.16	71	3.21	75	6.57	51.3
6	Chris Sale C. Sale	11.22	418.0	75	34	14	.708	75	2.97	521	0	0	0	356	138	149	37	107	28	0	1	1,705	9	2.30	4.87	0.80	30.6	6.3	1.11	.315	3.21	68	2.80	68	7.67	61.5
7	Hunter Greene H. Greene	11.19	453.2	84	23	28	.451	84	3.69	564	1	1	0	358	186	194	64	167	39	0	0	1,898	19	3.31	3.38	1.27	29.7	8.8	1.16	.276	3.85	83	3.87	89	7.10	24.2
8	Dylan Cease D. Cease	11.00	903.2	166	58	49	.542	166	3.69	1,104	3	3	0	740	371	409	102	374	31	0	8	3,807	48	3.72	2.95	1.02	29.0	9.8	1.23	.291	4.07	89	3.53	83	7.37	70.2
9	Freddy Peralta F. Peralta	10.96	727.2	148	54	34	.614	132	3.40	886	1	0	0	537	275	288	90	267	41	2	1	2,993	25	3.30	3.32	1.11	29.6	8.9	1.10	.262	3.56	81	3.61	86	6.64	49.4
10	Carlos Rodón C. Rodón	10.87	704.1	130	58	39	.598	128	3.55	851	2	1	0	551	278	296	91	234	31	0	1	2,896	34	2.99	3.64	1.16	29.4	8.1	1.11	.272	3.78	87	3.54	84	7.04	52.5
11	Gerrit Cole G. Cole	10.85	759.0	125	59	28	.678	125	3.12	915	6	4	0	593	263	279	102	185	19	0	2	3,018	13	2.19	4.95	1.21	30.3	6.1	1.03	.273	3.31	76	3.32	78	7.03	78.4
12	Brandon Woodruff B. Woodruff	10.80	512.2	88	34	20	.630	88	2.70	615	2	1	0	368	154	162	61	126	20	0	0	2,021	6	2.21	4.88	1.07	30.4	6.2	0.96	.256	2.84	64	3.16	75	6.46	61.1
13	Max Scherzer M. Scherzer	10.75	642.0	111	48	25	.658	111	3.08	767	2	0	0	509	220	230	92	150	29	0	1	2,567	14	2.10	5.11	1.29	29.9	5.8	1.03	.273	3.22	75	3.48	82	7.14	53.4
14	Robbie Ray R. Ray	10.61	616.0	109	39	33	.542	108	3.58	726	1	0	0	502	245	255	101	235	20	0	1	2,548	26	3.43	3.09	1.48	28.5	9.2	1.20	.274	3.73	87	4.15	103	7.33	-9.3
15	Tarik Skubal T. Skubal	10.42	723.2	130	52	34	.605	127	3.17	838	1	1	0	583	255	273	85	162	25	1	0	2,889	10	2.01	5.17	1.06	29.0	5.6	1.03	.280	3.40	77	3.14	76	7.25	79
16	Michael King M. King	10.32	477.0	156	30	28	.517	60	3.17	547	1	1	7	398	168	194	47	165	22	24	6	1,988	12	3.11	3.32	0.89	27.5	8.3	1.18	.291	3.66	77	3.33	80	7.51	44.1
17	Corbin Burnes C. Burnes	10.31	881.0	148	55	33	.625	145	2.86	1,009	0	0	0	659	280	311	83	249	35	2	1	3,527	38	2.54	4.05	0.85	28.6	7.1	1.03	.268	3.18	69	3.07	74	6.73	108.5
18	Shane Bieber S. Bieber	10.17	514.0	82	36	19	.655	82	2.91	581	2	0	0	436	166	177	50	125	10	0	0	2,071	23	2.19	4.65	0.88	28.1	6.0	1.09	.296	3.10	71	2.96	72	7.63	66.2
19	Jack Flaherty J. Flaherty	10.17	585.2	116	42	34	.553	111	4.15	662	0	0	0	537	270	287	83	217	33	0	3	2,489	21	3.33	3.05	1.28	26.6	8.7	1.29	.304	4.41	101	4.03	97	8.25	7.4
20	Shane McClanahan S. McClanahan	10.14	404.2	74	33	16	.673	74	3.02	456	0	0	0	331	136	143	48	116	5	0	1	1,627	19	2.58	3.93	1.07	28.0	7.1	1.10	.282	3.18	77	3.35	84	7.36	29.1
21	Cristian Javier C. Javier	10.12	506.0	117	34	17	.667	83	3.59	569	0	0	2	368	202	209	74	206	22	5	1	2,079	20	3.66	2.76	1.32	27.4	9.9	1.13	.243	3.72	87	4.18	100	6.55	-2.4
22	Kevin Gausman K. Gausman	10.09	935.0	162	63	48	.568	160	3.38	1,048	2	1	0	826	351	384	101	245	13	1	3	3,838	19	2.36	4.28	0.97	27.3	6.4	1.15	.298	3.70	84	3.15	76	7.95	102.2
23	Zack Wheeler Z. Wheeler	10.06	979.0	157	69	37	.651	157	2.91	1,094	4	2	0	775	316	342	91	220	47	0	4	3,903	18	2.02	4.97	0.84	28.0	5.6	1.02	.279	3.14	69	2.95	69	7.12	140.7
24	Aaron Nola A. Nola	10.05	899.2	150	52	51	.505	150	4.02	1,005	6	4	0	813	402	425	127	202	27	0	4	3,678	8	2.02	4.98	1.27	27.3	5.5	1.13	.296	4.25	95	3.53	83	8.13	72.5
25	MacKenzie Gore M. Gore	10.03	510.2	100	26	38	.406	97	4.16	569	0	0	0	504	236	262	66	208	21	0	0	2,205	38	3.67	2.74	1.16	25.8	9.4	1.39	.327	4.62	101	3.96	95	8.88	12.2