Shane Bieber had the best K/9 in 2020, with 14.20 per nine innings.

Interpreted as:

best k/9 with a minimum of 1 IP per team game by a player in 2020

	NAME	K/9	SEASON	TM	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	Shane Bieber S. Bieber	14.20	2020	CLE	12	8	1	.889	12	1.63	122	0	0	0	77.1	46	14	15	7	21	1	0	0	297	5	2.44	5.81	0.81	41.1	7.1	0.87	.267	1.75	37	2.06	46	5.35	20.5
2	Jacob deGrom J. deGrom	13.76	2020	NYM	12	4	2	.667	12	2.38	104	0	0	0	68.0	47	18	21	7	18	0	0	0	268	4	2.38	5.78	0.93	38.8	6.7	0.96	.288	2.78	57	2.26	52	6.22	15.9
3	Trevor Bauer T. Bauer	12.33	2020	CIN	11	5	4	.556	11	1.73	100	2	2	0	73.0	41	14	17	9	17	3	0	1	278	3	2.10	5.88	1.11	36.0	6.1	0.79	.215	2.10	36	2.87	61	5.05	14.1
4	Max Scherzer M. Scherzer	12.30	2020	WSH	12	5	4	.556	12	3.74	92	1	0	0	67.1	70	28	30	10	23	1	0	1	295	6	3.07	4.00	1.34	31.2	7.8	1.38	.355	4.01	83	3.45	76	9.36	8
5	Dinelson Lamet D. Lamet	12.13	2020	SDP	12	3	1	.750	12	2.09	93	0	0	0	69.0	39	16	18	5	20	4	0	0	267	1	2.61	4.65	0.65	34.8	7.5	0.86	.234	2.35	49	2.47	56	5.09	15.1
6	Aaron Nola A. Nola	12.11	2020	PHI	12	5	5	.500	12	3.28	96	2	1	0	71.1	54	26	31	9	23	2	0	2	289	1	2.90	4.17	1.14	33.2	8.0	1.08	.283	3.91	73	3.18	70	6.81	10.6
7	Lucas Giolito L. Giolito	12.07	2020	CWS	12	4	3	.571	12	3.48	97	1	1	0	72.1	47	28	31	8	28	2	0	0	288	3	3.48	3.46	1.00	33.7	9.7	1.04	.255	3.86	78	3.18	69	5.85	11.2
8	Gerrit Cole G. Cole	11.59	2020	NYY	12	7	3	.700	12	2.84	94	2	1	0	73.0	53	23	27	14	17	2	0	0	288	2	2.10	5.53	1.73	32.6	5.9	0.96	.242	3.33	65	3.88	87	6.53	4.9
9	Luis Castillo L. Castillo	11.44	2020	CIN	12	4	6	.400	12	3.21	89	1	0	0	70.0	62	25	31	5	24	1	0	0	292	1	3.09	3.71	0.64	30.5	8.2	1.23	.329	3.99	68	2.64	57	7.97	15.2
10	Brandon Woodruff B. Woodruff	11.12	2020	MIL	13	3	5	.375	13	3.05	91	1	0	0	73.2	55	25	26	9	18	4	0	0	293	1	2.20	5.06	1.10	31.1	6.1	0.99	.269	3.18	68	3.20	72	6.72	10.2
11	Yu Darvish Y. Darvish	11.01	2020	CHC	12	8	3	.727	12	2.01	93	0	0	0	76.0	59	17	18	5	14	2	0	1	297	3	1.66	6.64	0.59	31.3	4.7	0.96	.295	2.13	46	2.22	50	6.99	18.6
12	Carlos Carrasco C. Carrasco	10.85	2020	CLE	12	3	4	.429	12	2.91	82	0	0	0	68.0	55	22	22	8	27	2	0	0	280	6	3.57	3.04	1.06	29.3	9.6	1.21	.292	2.91	66	3.58	81	7.28	6.5
13	Kenta Maeda K. Maeda	10.80	2020	MIN	11	6	1	.857	11	2.70	80	0	0	0	66.2	40	20	20	9	10	0	0	0	248	0	1.35	8.00	1.21	32.3	4.0	0.75	.208	2.70	62	2.99	68	5.40	10.5
14	Zac Gallen Z. Gallen	10.25	2020	ARI	12	3	2	.600	12	2.75	82	0	0	0	72.0	55	22	24	9	25	2	0	0	291	4	3.13	3.28	1.13	28.2	8.6	1.11	.266	3.00	61	3.65	84	6.88	5.7
15	Dylan Bundy D. Bundy	9.87	2020	LAA	11	6	3	.667	11	3.29	72	1	0	0	65.2	51	24	27	5	17	4	0	1	267	2	2.33	4.24	0.69	27.0	6.4	1.04	.272	3.70	73	2.94	64	6.99	11.7
16	José Berríos J. Berríos	9.71	2020	MIN	12	5	4	.556	12	4.00	68	0	0	0	63.0	57	28	28	8	26	3	0	0	271	5	3.71	2.62	1.14	25.1	9.6	1.32	.295	4.00	91	4.06	92	8.14	2.4
17	Framber Valdez F. Valdez	9.68	2020	HOU	11	5	3	.625	10	3.57	76	0	0	0	70.2	63	28	32	5	16	5	0	0	288	6	2.04	4.75	0.64	26.4	5.6	1.12	.312	4.08	81	2.84	65	8.02	12.3
18	Hyun Jin Ryu H. Jin Ryu	9.67	2020	TOR	12	5	2	.714	12	2.69	72	0	0	0	67.0	60	20	22	6	17	1	0	0	275	1	2.28	4.24	0.81	26.2	6.2	1.15	.302	2.96	58	3.00	68	8.06	10.5
19	Lance Lynn L. Lynn	9.54	2020	TEX	13	6	3	.667	13	3.32	89	1	0	0	84.0	64	31	34	13	25	6	0	0	344	2	2.68	3.56	1.39	25.9	7.3	1.06	.242	3.64	74	4.18	91	6.86	3.7
20	Andrew Heaney A. Heaney	9.45	2020	LAA	12	4	3	.571	12	4.45	70	0	0	0	66.2	63	33	35	9	19	2	0	1	279	2	2.57	3.68	1.21	25.1	6.8	1.23	.302	4.72	99	3.78	83	8.51	5.8
21	Zack Greinke Z. Greinke	9.00	2020	HOU	12	3	3	.500	12	4.03	67	0	0	0	67.0	67	30	30	6	9	1	0	0	273	3	1.21	7.44	0.81	24.5	3.3	1.13	.321	4.03	92	2.79	64	9.00	12
22	Matthew Boyd M. Boyd	8.95	2020	DET	12	3	7	.300	12	6.71	60	1	0	0	60.1	67	45	46	15	22	5	0	0	271	5	3.28	2.73	2.24	22.1	8.1	1.48	.308	6.86	153	5.77	131	9.99	-9.3
23	Brady Singer B. Singer	8.53	2020	KCR	12	4	5	.444	12	4.06	61	0	0	0	64.1	52	29	29	8	23	2	0	0	263	5	3.22	2.65	1.12	23.2	8.7	1.17	.260	4.06	89	4.07	93	7.27	2.3
24	Aaron Civale A. Civale	8.39	2020	CLE	12	4	6	.400	12	4.74	69	1	0	0	74.0	82	39	39	11	16	3	0	0	312	0	1.95	4.31	1.34	22.1	5.1	1.32	.333	4.74	107	4.02	91	9.97	3.5
25	Marco Gonzales M. Gonzales	8.27	2020	SEA	11	7	2	.778	11	3.10	64	1	0	0	69.2	59	24	27	8	7	4	0	0	277	0	0.90	9.14	1.03	23.1	2.5	0.95	.263	3.49	74	3.31	77	7.62	7.9