Since 2018, George Kirby has the best K/BB, with 7.56 K/BB.

Interpreted as:

k/bb with a minimum of 0.5 IP per team game leaders since 2018

	NAME	K/BB	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	George Kirby G. Kirby	7.56	89	34	26	.567	89	3.43	484	1	0	0	511.2	495	195	210	57	64	18	0	1	2,077	10	8.51	1.13	1.00	23.3	3.1	1.09	.301	3.69	89	3.22	81	8.71	43.4
2	Jacob deGrom J. deGrom	6.96	117	40	26	.606	117	2.10	968	2	1	0	719.1	489	168	187	59	139	15	0	4	2,758	10	12.11	1.74	0.74	35.1	5.0	0.87	.273	2.34	53	2.18	53	6.12	159.4
3	Max Scherzer M. Scherzer	5.67	162	74	37	.667	162	2.90	1,259	4	1	0	984.0	760	317	334	124	222	46	0	7	3,921	17	11.52	2.03	1.13	32.1	5.7	1.00	.280	3.05	69	3.07	72	6.95	128.3
4	Chris Sale C. Sale	5.64	119	48	28	.632	119	3.24	908	1	1	0	669.1	544	241	261	70	161	51	0	1	2,721	15	12.21	2.16	0.94	33.4	5.9	1.05	.310	3.51	72	2.77	65	7.31	108.4
5	Spencer Schwellenbach S. Schwellenbach	5.52	27	9	9	.500	27	3.24	160	0	0	0	161.1	137	58	63	18	29	7	0	2	650	4	8.93	1.62	1.00	24.6	4.5	1.03	.273	3.51	78	3.27	83	7.64	12.4
6	Justin Verlander J. Verlander	5.32	148	74	35	.679	148	2.89	1,032	3	2	0	907.2	684	291	313	116	194	31	0	0	3,589	19	10.23	1.92	1.15	28.8	5.4	0.97	.256	3.10	70	3.30	79	6.78	90.7
7	Paul Skenes P. Skenes	5.28	30	14	6	.700	30	2.15	211	0	0	0	175.2	125	42	46	14	40	7	0	0	679	3	10.81	2.05	0.72	31.1	5.9	0.94	.273	2.36	51	2.57	64	6.40	28.7
8	Gerrit Cole G. Cole	5.11	190	94	38	.712	190	2.97	1,517	7	5	0	1171.2	878	386	413	150	297	29	0	2	4,634	26	11.65	2.28	1.15	32.7	6.4	1.00	.276	3.17	71	3.09	72	6.74	156.1
9	Shane Bieber S. Bieber	5.10	136	62	32	.660	134	3.22	958	5	2	0	843.0	752	302	323	94	188	18	1	1	3,415	34	10.23	2.01	1.00	28.1	5.5	1.12	.305	3.45	76	3.08	73	8.03	108
10	Joe Ryan J. Ryan	5.02	91	35	28	.556	91	3.84	572	1	1	0	510.1	427	218	227	81	114	26	0	0	2,072	8	10.09	2.01	1.43	27.6	5.5	1.06	.271	4.00	95	3.81	93	7.53	16.3
11	Shota Imanaga S. Imanaga	4.98	36	18	4	.818	36	2.88	204	0	0	0	212.1	180	68	79	34	41	3	0	0	853	3	8.65	1.74	1.44	23.9	4.8	1.04	.256	3.35	72	3.92	99	7.63	0.8
12	Clayton Kershaw C. Kershaw	4.96	140	68	30	.694	139	2.83	848	0	0	0	807.2	660	254	281	99	171	15	0	1	3,214	32	9.45	1.91	1.10	26.4	5.3	1.03	.270	3.13	69	3.36	79	7.35	80.2
13	Logan Gilbert L. Gilbert	4.84	127	40	31	.563	127	3.55	755	2	1	0	734.2	617	290	307	94	156	19	0	6	2,959	33	9.25	1.91	1.15	25.5	5.3	1.05	.270	3.76	91	3.49	88	7.56	40.5
14	Ryan Gusto R. Gusto	4.83	8	3	1	.750	4	3.00	29	0	0	0	27.0	25	9	9	3	6	1	0	0	110	0	9.67	2.00	1.00	26.4	5.5	1.15	.310	3.00	77	3.13	78	8.33	2.6
15	Tarik Skubal T. Skubal	4.83	113	44	33	.571	110	3.29	696	0	0	0	612.0	508	224	242	76	144	22	1	0	2,468	8	10.24	2.12	1.12	28.2	5.8	1.07	.282	3.56	80	3.31	80	7.47	54.3
16	Hyun Jin Ryu H. Jin Ryu	4.69	104	45	23	.662	104	3.17	521	2	2	0	580.0	543	204	225	70	111	9	0	3	2,360	4	8.08	1.72	1.09	22.1	4.7	1.13	.287	3.49	74	3.57	84	8.43	45.4
17	Bailey Ober B. Ober	4.67	94	28	22	.560	94	3.79	509	1	0	0	504.0	438	212	221	78	109	17	0	0	2,033	4	9.09	1.95	1.39	25.0	5.4	1.09	.273	3.95	92	3.92	94	7.82	12.9
18	Brandon Woodruff B. Woodruff	4.67	122	44	23	.657	107	2.98	756	2	1	1	637.1	492	211	220	70	162	26	4	0	2,543	7	10.68	2.29	0.99	29.7	6.4	1.03	.276	3.11	70	3.11	73	6.95	81.7
19	Bryan Woo B. Woo	4.55	46	15	9	.625	46	3.31	232	0	0	0	247.1	196	91	96	30	51	11	0	1	990	1	8.44	1.86	1.09	23.4	5.2	1.00	.249	3.49	86	3.63	91	7.13	9.7
20	Zach Eflin Z. Eflin	4.52	167	60	53	.531	155	3.90	814	3	2	1	892.2	886	387	421	118	180	25	5	13	3,708	10	8.21	1.81	1.19	22.0	4.9	1.19	.299	4.24	94	3.76	89	8.93	47.1
21	Yusmeiro Petit Y. Petit	4.47	258	22	10	.688	0	3.07	201	0	0	2	275.2	221	94	96	39	45	1	34	5	1,077	4	6.56	1.47	1.27	18.7	4.2	0.96	.230	3.13	73	4.06	96	7.22	5.5
22	Zack Greinke Z. Greinke	4.42	164	53	49	.520	160	3.73	743	1	0	0	933.2	902	387	409	124	168	20	0	5	3,797	21	7.16	1.62	1.20	19.6	4.4	1.15	.284	3.94	87	3.92	94	8.69	27.8
23	Zack Wheeler Z. Wheeler	4.42	200	84	48	.636	200	3.17	1,330	3	2	0	1251.0	1,049	441	473	115	301	52	0	8	5,064	23	9.57	2.17	0.83	26.3	5.9	1.08	.286	3.40	77	3.09	73	7.55	157.9
24	Yoshinobu Yamamoto Y. Yamamoto	4.40	25	11	4	.733	25	2.35	154	0	0	0	130.0	102	34	39	9	35	1	0	0	521	3	10.66	2.42	0.62	29.6	6.7	1.05	.289	2.70	58	2.49	60	7.06	23.1
25	Michael Pineda M. Pineda	4.36	64	24	20	.545	63	4.08	279	0	0	0	328.2	338	149	158	53	64	8	0	2	1,369	9	7.64	1.75	1.45	20.4	4.7	1.22	.295	4.33	94	4.23	98	9.26	4.1