Roki Sasaki has walked the highest walks per nine innings by an active pitcher this season, with 5.77 BB/9.

Interpreted as:

active leaders in bb/9 with a minimum of 0.5 IP per team game this regular season

	NAME	BB/9	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	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Roki Sasaki R. Sasaki	5.77	2025	LAD	8	1	1	.500	8	4.72	24	0	0	0	34.1	29	18	18	6	22	3	0	0	154	2	6.29	1.09	1.57	15.6	14.3	1.49	.232	4.72	118	6.13	152	7.60	-7.8
2	Mike Vasil M. Vasil	5.50	2025	CWS	17	3	2	.600	0	2.10	24	0	0	1	34.1	23	8	9	2	21	3	7	3	147	0	6.29	1.14	0.52	16.3	14.3	1.28	.216	2.36	53	4.52	108	6.03	-1.3
3	Gavin Williams G. Williams	5.47	2025	CLE	11	4	3	.571	11	4.27	60	0	0	0	52.2	51	25	27	8	32	0	0	0	233	5	10.25	1.88	1.37	25.8	13.7	1.58	.323	4.61	110	4.59	114	8.72	-3.4
4	Sandy Alcantara S. Alcantara	5.12	2025	MIA	11	2	7	.222	11	8.47	40	0	0	0	51.0	56	48	49	8	29	2	0	0	237	4	7.06	1.38	1.41	16.9	12.2	1.67	.304	8.65	204	5.36	135	9.88	-7.9
5	Sean Burke S. Burke	5.00	2025	CWS	11	3	5	.375	10	4.33	39	0	0	0	54.0	49	26	31	9	30	4	0	0	241	2	6.50	1.30	1.50	16.2	12.4	1.46	.252	5.17	109	5.68	136	8.17	-8.7
6	Charlie Morton C. Morton	4.98	2025	BAL	13	1	7	.125	7	7.09	45	0	0	0	47.0	52	37	38	10	26	3	1	0	219	0	8.62	1.73	1.91	20.5	11.9	1.66	.311	7.28	184	5.77	145	9.96	-9.6
7	Jackson Jobe J. Jobe	4.96	2025	DET	10	4	1	.800	10	4.22	39	0	0	0	49.0	46	23	24	7	27	2	0	0	218	1	7.16	1.44	1.29	17.9	12.4	1.49	.273	4.41	109	5.11	127	8.45	-6.1
8	Brayan Bello B. Bello	4.95	2025	BOS	8	2	1	.667	8	3.83	29	0	0	0	40.0	43	17	19	5	22	2	0	0	180	0	6.53	1.32	1.13	16.1	12.2	1.63	.311	4.27	92	5.04	123	9.68	-4.2
9	Yusei Kikuchi Y. Kikuchi	4.87	2025	LAA	12	1	5	.167	12	3.06	58	0	0	0	64.2	63	22	25	7	35	1	0	3	284	3	8.07	1.66	0.97	20.4	12.3	1.52	.306	3.48	76	4.35	104	8.77	-1.2
10	Bryce Miller B. Miller	4.76	2025	SEA	8	2	4	.333	8	5.22	35	0	0	0	39.2	40	23	23	3	21	1	0	0	174	1	7.94	1.67	0.68	20.1	12.1	1.54	.325	5.22	141	3.95	102	9.08	-0.4
11	Luis L. Ortiz L. L. Ortiz	4.72	2025	CLE	10	2	5	.286	10	4.73	59	0	0	0	53.1	48	28	29	7	28	0	0	0	233	0	9.96	2.11	1.18	25.3	12.0	1.43	.295	4.89	121	4.14	103	8.10	-0.8
12	Logan Allen L. Allen	4.69	2025	CLE	10	2	3	.400	10	4.31	36	0	0	0	48.0	53	23	26	4	25	1	0	0	219	2	6.75	1.44	0.75	16.4	11.4	1.63	.320	4.88	111	4.28	107	9.94	-1.5
13	Quinn Priester Q. Priester	4.63	2025	MIL	9	1	2	.333	7	4.23	32	0	0	0	44.2	41	21	23	5	23	0	0	0	193	1	6.45	1.39	1.01	16.6	11.9	1.43	.271	4.63	104	4.63	116	8.26	-3.1
14	Jack Leiter J. Leiter	4.61	2025	TEX	8	3	2	.600	8	4.17	30	0	0	0	41.0	30	19	19	4	21	1	0	0	172	1	6.59	1.43	0.88	17.4	12.2	1.24	.224	4.17	106	4.48	109	6.59	-1.5
15	Ronny Henriquez R. Henriquez	4.61	2025	MIA	24	3	1	.750	0	2.30	38	0	0	1	27.1	20	7	10	3	14	2	3	2	119	1	12.51	2.71	0.99	31.9	11.8	1.24	.274	3.29	55	3.47	88	6.59	1.5
16	Tylor Megill T. Megill	4.53	2025	NYM	11	4	4	.500	11	3.52	72	0	0	0	53.2	46	21	25	4	27	4	0	0	237	2	12.07	2.67	0.67	30.4	11.4	1.36	.323	4.19	90	3.09	79	7.71	5
17	José Buttó J. Buttó	4.45	2025	NYM	20	2	0	1.000	0	3.81	25	0	0	0	28.1	29	12	13	2	14	1	5	0	124	1	7.94	1.79	0.64	20.2	11.3	1.52	.329	4.13	97	3.81	97	9.21	0.3
18	Randy Vásquez R. Vásquez	4.39	2025	SDP	11	3	4	.429	11	3.58	32	0	0	0	55.1	50	22	23	6	27	3	0	0	239	2	5.20	1.19	0.98	13.4	11.3	1.39	.257	3.74	91	4.95	126	8.13	-6.4
19	Ryan Gusto R. Gusto	4.38	2025	HOU	13	3	2	.600	7	4.62	42	0	0	0	39.0	42	20	23	6	19	1	1	0	178	0	9.69	2.21	1.38	23.6	10.7	1.56	.327	5.31	119	4.45	111	9.69	-2
20	Jack Kochanowicz J. Kochanowicz	4.33	2025	LAA	11	3	6	.333	11	5.07	40	0	0	0	60.1	63	34	35	9	29	4	0	2	264	2	5.97	1.38	1.34	15.2	11.0	1.52	.297	5.22	126	5.32	128	9.40	-7.4
21	Zac Gallen Z. Gallen	4.32	2025	AZ	12	3	7	.300	12	5.54	66	0	0	0	66.2	61	41	42	10	32	2	0	1	292	1	8.91	2.06	1.35	22.6	11.0	1.39	.280	5.67	134	4.57	119	8.24	-5.6
22	José Soriano J. Soriano	4.31	2025	LAA	11	3	5	.375	11	3.73	47	0	0	0	62.2	66	26	29	3	30	1	0	0	272	3	6.75	1.57	0.43	17.3	11.0	1.53	.330	4.16	93	3.67	88	9.48	3.4
23	AJ Smith-Shawver	4.26	2025	ATL	9	3	2	.600	9	3.86	42	0	0	0	44.1	42	19	20	4	21	1	0	0	192	3	8.53	2.00	0.81	21.9	10.9	1.42	.306	4.06	94	3.83	99	8.53	0.2
24	Griffin Canning G. Canning	4.25	2025	NYM	11	5	2	.714	11	3.23	50	0	0	0	53.0	49	19	21	6	25	0	0	0	229	1	8.49	2.00	1.02	21.8	10.9	1.40	.291	3.57	82	4.07	104	8.32	-0.9
25	Kodai Senga K. Senga	4.20	2025	NYM	10	5	3	.625	10	1.46	52	0	0	0	55.2	43	9	12	2	26	1	0	0	228	4	8.41	2.00	0.32	22.8	11.4	1.24	.279	1.94	37	3.12	80	6.95	5