Corbin Burnes had the highest K/BB in 2021, with 6.88 K/BB.

Interpreted as:

k/bb with a minimum of 1 IP per team game leaders 2021

	NAME	K/BB	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Corbin Burnes C. Burnes	6.88	2021	MIL	28	11	5	.688	28	2.43	234	0	0	0	167.0	123	45	47	7	34	6	0	0	657	5	12.61	1.83	0.38	35.6	5.2	0.94	.309	2.53	58	1.62	38	6.63	48.9
2	Max Scherzer M. Scherzer	6.56	2021	TOT	30	15	4	.789	30	2.46	236	1	0	0	179.1	119	49	53	23	36	10	0	0	693	2	11.84	1.81	1.15	34.1	5.2	0.86	.247	2.66	59	2.97	69	5.97	26
3	Gerrit Cole G. Cole	5.93	2021	NYY	30	16	8	.667	30	3.23	243	2	1	0	181.1	151	65	69	24	41	2	0	0	726	5	12.06	2.03	1.19	33.5	5.6	1.06	.305	3.42	76	2.91	67	7.49	28.1
4	Aaron Nola A. Nola	5.72	2021	PHI	32	9	9	.500	32	4.63	223	1	1	0	180.2	165	93	95	26	39	9	0	1	749	0	11.11	1.94	1.30	29.8	5.2	1.13	.308	4.73	110	3.36	78	8.22	19.1
5	Nathan Eovaldi N. Eovaldi	5.57	2021	BOS	32	11	9	.550	32	3.75	195	0	0	0	182.1	182	76	81	15	35	7	0	2	764	6	9.63	1.73	0.74	25.5	4.6	1.19	.326	4.00	82	2.78	64	8.98	30.9
6	Zack Wheeler Z. Wheeler	5.37	2021	PHI	32	14	10	.583	32	2.78	247	3	2	0	213.1	169	66	72	16	46	8	0	1	849	6	10.42	1.94	0.68	29.1	5.4	1.01	.288	3.04	66	2.58	60	7.13	40.7
7	Julio Urías J. Urías	5.13	2021	LAD	32	20	3	.870	32	2.96	195	0	0	0	185.2	151	61	67	19	38	7	0	3	745	2	9.45	1.84	0.92	26.2	5.1	1.02	.272	3.25	73	3.12	73	7.32	23.8
8	Brandon Woodruff B. Woodruff	4.91	2021	MIL	30	9	10	.474	30	2.56	211	0	0	0	179.1	130	51	54	18	43	7	0	0	708	2	10.59	2.16	0.90	29.8	6.1	0.96	.261	2.71	61	2.95	69	6.52	26.4
9	Robbie Ray R. Ray	4.77	2021	TOR	32	13	7	.650	32	2.84	248	0	0	0	193.1	150	61	62	33	52	4	0	0	773	5	11.54	2.42	1.54	32.1	6.7	1.04	.268	2.89	63	3.68	87	6.98	11.8
10	Sean Manaea S. Manaea	4.73	2021	OAK	32	11	10	.524	32	3.91	194	2	2	0	179.1	179	78	79	25	41	9	0	0	754	5	9.74	2.06	1.25	25.7	5.4	1.23	.318	3.96	95	3.65	88	8.98	10
11	Kevin Gausman K. Gausman	4.54	2021	SFG	33	14	6	.700	33	2.81	227	0	0	0	192.0	150	60	66	20	50	4	0	1	775	7	10.64	2.34	0.94	29.3	6.5	1.04	.274	3.09	70	3.00	74	7.03	23.5
12	José Berríos J. Berríos	4.53	2021	TOT	32	12	9	.571	32	3.52	204	1	0	0	192.0	159	75	83	22	45	15	0	0	781	3	9.56	2.11	1.03	26.1	5.8	1.06	.277	3.89	81	3.46	82	7.45	16.5
13	Yu Darvish Y. Darvish	4.52	2021	SDP	30	8	11	.421	30	4.22	199	0	0	0	166.1	138	78	81	28	44	8	0	1	681	9	10.77	2.38	1.52	29.2	6.5	1.09	.274	4.38	107	3.90	93	7.47	5.6
14	Walker Buehler W. Buehler	4.08	2021	LAD	33	16	4	.800	33	2.47	212	0	0	0	207.2	149	57	61	19	52	6	0	2	815	5	9.19	2.25	0.82	26.0	6.4	0.97	.247	2.64	61	3.15	74	6.46	26
15	Sandy Alcantara S. Alcantara	4.02	2021	MIA	33	9	15	.375	33	3.19	201	1	0	0	205.2	171	73	85	21	50	10	0	2	837	6	8.80	2.19	0.92	24.0	6.0	1.07	.270	3.72	76	3.41	82	7.48	17.2
16	Lucas Giolito L. Giolito	3.87	2021	CWS	31	11	9	.550	31	3.53	201	1	0	0	178.2	145	70	74	27	52	2	0	1	720	12	10.13	2.62	1.36	27.9	7.2	1.10	.269	3.73	81	3.78	85	7.30	13
17	Hyun Jin Ryu H. Jin Ryu	3.86	2021	TOR	31	14	10	.583	31	4.37	143	1	1	0	169.0	170	82	85	24	37	2	0	0	701	2	7.62	1.97	1.28	20.4	5.3	1.22	.295	4.53	97	4.01	95	9.05	4.2
18	Max Fried M. Fried	3.85	2021	ATL	28	14	7	.667	28	3.04	158	2	2	0	165.2	139	56	61	15	41	7	0	0	667	7	8.58	2.23	0.81	23.7	6.1	1.09	.278	3.31	72	3.30	79	7.55	16.6
19	Joe Musgrove J. Musgrove	3.76	2021	SDP	32	11	9	.550	31	3.18	203	2	2	0	181.1	142	64	68	22	54	18	1	3	748	3	10.08	2.68	1.09	27.1	7.2	1.08	.266	3.38	81	3.69	88	7.05	10.2
20	Charlie Morton C. Morton	3.72	2021	ATL	33	14	6	.700	33	3.34	216	0	0	0	185.2	136	69	77	16	58	17	0	1	756	5	10.47	2.81	0.78	28.6	7.7	1.04	.267	3.73	79	3.17	75	6.59	21.4
21	Frankie Montas Jr. F. Montas Jr.	3.63	2021	OAK	32	13	9	.591	32	3.37	207	0	0	0	187.0	164	70	79	20	57	7	0	1	778	11	9.96	2.74	0.96	26.6	7.3	1.18	.296	3.80	82	3.37	81	7.89	16.5
22	Anthony DeSclafani A. DeSclafani	3.62	2021	SFG	31	13	7	.650	31	3.17	152	2	2	0	167.2	141	59	61	19	42	2	0	1	676	7	8.16	2.25	1.02	22.5	6.2	1.09	.265	3.27	79	3.61	89	7.57	8.6
23	Marcus Stroman M. Stroman	3.59	2021	NYM	33	10	13	.435	33	3.02	158	0	0	0	179.0	161	60	70	17	44	7	0	2	730	7	7.94	2.21	0.85	21.6	6.0	1.15	.286	3.52	76	3.49	83	8.09	14.2
24	Tyler Anderson T. Anderson	3.53	2021	TOT	31	7	11	.389	31	4.53	134	0	0	0	167.0	170	84	87	27	38	1	0	2	703	1	7.22	2.05	1.46	19.1	5.4	1.25	.284	4.69	108	4.36	104	9.16	-3
25	Adam Wainwright A. Wainwright	3.48	2021	STL	32	17	7	.708	32	3.05	174	3	1	0	206.1	168	70	72	21	50	9	0	3	828	4	7.59	2.18	0.92	21.0	6.0	1.06	.256	3.14	75	3.66	88	7.33	11.5