George Kirby had the best K/BB with 80.0+ innings pitched in 2023, with 9.05 K/BB.

	NAME	K/BB	IP	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	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	9.05	190.2	2023	SEA	31	12	10	.545	31	3.35	172	1	0	0	179	71	74	22	19	6	0	1	757	1	8.12	0.90	1.04	22.7	2.5	1.04	.292	3.49	83	3.34	81	8.45	16.7
2	Zach Eflin Z. Eflin	7.75	177.2	2023	TBR	31	16	8	.667	31	3.50	186	0	0	0	158	69	69	19	24	3	0	1	703	0	9.42	1.22	0.96	26.5	3.4	1.02	.295	3.50	85	3.00	72	8.00	23.2
3	Tarik Skubal T. Skubal	7.29	80.1	2023	DET	15	7	3	.700	15	2.80	102	0	0	0	58	25	28	4	14	3	0	0	310	1	11.43	1.57	0.45	32.9	4.5	0.90	.289	3.14	66	1.99	47	6.50	20.2
4	Logan Webb L. Webb	6.26	216.0	2023	SFG	33	10	11	.476	33	3.25	194	2	1	0	201	78	83	20	31	5	0	0	850	1	8.08	1.29	0.83	22.8	3.6	1.07	.302	3.46	77	3.16	75	8.38	25.7
5	Zack Littell Z. Littell	6.17	90.0	2023	TOT	28	3	6	.333	14	4.10	74	0	0	0	94	41	43	13	12	4	7	1	379	4	7.40	1.20	1.30	19.5	3.2	1.18	.293	4.30	99	4.02	97	9.40	1.3
6	Cristopher Sánchez C. Sánchez	6.00	99.1	2023	PHI	19	3	5	.375	18	3.44	96	0	0	0	88	38	44	16	16	3	1	0	396	3	8.70	1.45	1.45	24.2	4.0	1.05	.272	3.99	79	3.99	89	7.97	5.2
7	Joe Ryan J. Ryan	5.79	161.2	2023	MIN	29	11	10	.524	29	4.51	197	1	1	0	155	81	83	32	34	6	0	0	672	3	10.97	1.89	1.78	29.3	5.1	1.17	.305	4.62	105	4.13	96	8.63	2.7
8	Zack Wheeler Z. Wheeler	5.44	192.0	2023	PHI	32	13	6	.684	32	3.61	212	0	0	0	168	77	82	20	39	9	0	0	787	1	9.94	1.83	0.94	26.9	5.0	1.08	.292	3.84	82	3.15	71	7.88	27.7
9	Braxton Garrett B. Garrett	5.38	159.2	2023	MIA	31	9	7	.563	30	3.66	156	0	0	0	154	65	68	20	29	11	1	0	659	4	8.79	1.63	1.13	23.7	4.4	1.15	.302	3.83	82	3.68	84	8.68	12.4
10	Logan Gilbert L. Gilbert	5.25	190.2	2023	SEA	32	12	7	.632	32	3.73	189	1	1	0	169	79	82	29	36	2	0	1	770	6	8.92	1.70	1.37	24.5	4.7	1.08	.272	3.87	93	3.84	94	7.98	5.6
11	Matt Strahm M. Strahm	5.14	87.2	2023	PHI	56	9	5	.643	10	3.29	108	0	0	2	68	32	34	11	21	3	6	0	351	1	11.09	2.16	1.13	30.8	6.0	1.02	.274	3.49	75	3.24	73	6.98	11.7
12	Bailey Ober B. Ober	5.03	144.1	2023	MIN	26	8	6	.571	26	3.43	146	0	0	0	125	55	58	22	29	7	0	0	577	1	9.10	1.81	1.37	25.3	5.0	1.07	.276	3.62	80	3.96	92	7.79	5.2
13	Justin Steele J. Steele	4.89	173.1	2023	CHC	30	16	5	.762	30	3.06	176	0	0	0	167	59	71	14	36	7	0	0	716	9	9.14	1.87	0.73	24.6	5.0	1.17	.317	3.69	72	3.01	70	8.67	24.9
14	Pablo López P. López	4.88	194.0	2023	MIN	32	11	8	.579	32	3.66	234	1	1	0	176	79	81	24	48	9	0	1	801	7	10.86	2.23	1.11	29.2	6.0	1.15	.313	3.76	86	3.33	78	8.16	20.5
15	Julio Urías J. Urías	4.88	117.1	2023	LAD	21	11	8	.579	21	4.60	117	0	0	0	112	60	61	24	24	6	0	0	482	2	8.97	1.84	1.84	24.3	5.0	1.16	.283	4.68	107	4.68	105	8.59	-2.7
16	Spencer Strider S. Strider	4.84	186.2	2023	ATL	32	19	5	.792	32	3.86	281	0	0	0	146	80	85	22	58	9	0	1	763	6	13.55	2.80	1.06	36.8	7.6	1.09	.316	4.10	87	2.85	66	7.04	30.3
17	Ryan Yarbrough R. Yarbrough	4.79	89.2	2023	TOT	25	8	7	.533	9	4.52	67	0	0	1	96	45	45	13	14	8	6	0	377	1	6.72	1.41	1.30	17.8	3.7	1.23	.302	4.52	103	4.38	100	9.64	-0.1
18	Zac Gallen Z. Gallen	4.68	210.0	2023	ARI	34	17	8	.680	34	3.47	220	1	1	0	188	81	87	22	47	5	0	0	846	8	9.43	2.01	0.94	26.0	5.6	1.12	.301	3.73	78	3.26	77	8.06	23.4
19	Gerrit Cole G. Cole	4.63	209.0	2023	NYY	33	15	4	.789	33	2.63	222	2	2	0	157	61	64	20	48	7	0	0	821	4	9.56	2.07	0.86	27.0	5.8	0.98	.261	2.76	61	3.16	72	6.76	28.4
20	Joe Musgrove J. Musgrove	4.62	97.1	2023	SDP	17	10	3	.769	17	3.05	97	0	0	0	90	33	35	10	21	9	0	1	399	2	8.97	1.94	0.92	24.3	5.3	1.14	.305	3.24	73	3.52	81	8.32	8.8
21	Bryce Miller B. Miller	4.58	131.1	2023	SEA	25	8	7	.533	25	4.32	119	0	0	0	124	63	64	18	26	7	0	0	537	2	8.15	1.78	1.23	22.2	4.8	1.14	.289	4.39	107	3.97	97	8.50	1.8
22	Jakob Junis J. Junis	4.57	86.0	2023	SFG	40	4	3	.571	4	3.87	96	0	0	1	90	37	42	12	21	5	6	1	367	5	10.05	2.20	1.26	26.2	5.7	1.29	.335	4.40	91	3.74	89	9.42	4.4
23	Aaron Nola A. Nola	4.49	193.2	2023	PHI	32	12	9	.571	32	4.46	202	0	0	0	178	96	105	32	45	1	0	0	793	2	9.39	2.09	1.49	25.5	5.7	1.15	.285	4.88	102	4.03	90	8.27	9.4
24	Tyler Glasnow T. Glasnow	4.38	120.0	2023	TBR	21	10	7	.588	21	3.53	162	0	0	0	93	47	52	13	37	1	0	0	485	11	12.15	2.78	0.97	33.4	7.6	1.08	.294	3.90	86	2.91	70	6.98	16.9
25	Ross Stripling R. Stripling	4.38	89.0	2023	SFG	22	0	4	.000	11	5.36	70	0	0	0	104	53	54	20	16	2	5	0	381	2	7.08	1.62	2.02	18.4	4.2	1.35	.308	5.46	126	5.21	124	10.52	-10.5