Albert Abreu walked 4.66 batters per nine innings in his rookie season in 2021.

Interpreted as:

pitchers with 3.9 or higher bb/9 allowed in 2021

	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	Albert Abreu A. Abreu	4.66	2021	NYY	28	2	0	1.000	0	5.15	35	0	0	1	36.2	27	21	21	8	19	3	14	1	156	3	8.59	1.84	1.96	22.4	12.2	1.25	.209	5.15	122	5.89	136	6.63	-6.3
2	Bryan Abreu B. Abreu	4.50	2021	HOU	31	3	3	.500	0	5.75	36	0	0	1	36.0	35	23	26	4	18	3	3	0	161	4	9.00	2.00	1.00	22.4	11.2	1.47	.310	6.50	134	4.36	103	8.75	-0.5
3	Jason Adam J. Adam	5.06	2021	CHC	12	1	0	1.000	0	5.91	19	0	0	0	10.2	10	7	7	1	6	3	4	0	50	0	16.03	3.17	0.84	38.0	12.0	1.50	.429	5.91	142	3.35	80	8.44	1
4	Austin Adams A. Adams	5.98	2021	SDP	65	3	2	.600	0	4.10	76	0	0	0	52.2	28	24	28	1	35	24	18	2	241	4	12.99	2.17	0.17	31.5	14.5	1.20	.257	4.78	104	3.88	93	4.78	1.8
5	Miguel Aguilar M. Aguilar	5.14	2021	ARI	9	1	1	.500	0	6.43	3	0	0	0	7.0	6	5	6	0	4	0	2	1	29	0	3.86	0.75	0.00	10.3	13.8	1.43	.273	7.71	153	4.02	98	7.71	0.1
6	R.J. Alaniz	10.13	2021	CIN	3	0	0		0	3.38	3	0	0	0	2.2	1	1	1	1	3	1	0	0	13	0	10.13	1.00	3.38	23.1	23.1	1.50	.000	3.38	77	10.29	231	3.38	-1.6
7	Andrew Albers A. Albers	4.26	2021	MIN	5	1	2	.333	3	7.58	12	0	0	0	19.0	24	16	16	9	9	1	2	1	89	0	5.68	1.33	4.26	13.5	10.1	1.74	.259	7.58	177	9.64	228	11.37	-11.5
8	Yency Almonte Y. Almonte	5.48	2021	COL	48	1	3	.250	0	7.55	47	0	0	0	47.2	47	40	42	9	29	4	15	1	217	3	8.87	1.62	1.70	21.7	13.4	1.59	.297	7.93	157	5.72	129	8.87	-6.3
9	Albert Almora Jr. A. Almora Jr.	9.00	2021	NYM	1	0	0		0	27.00	0	0	0	0	1.0	1	3	3	1	1	1	1	0	6	0	0.00	0.00	9.00	0.0	16.7	2.00	.000	27.00	677	22.16	528	9.00	-2
10	José Alvarado J. Alvarado	7.60	2021	PHI	64	7	1	.875	0	4.20	68	0	0	5	55.2	42	26	30	5	47	7	10	5	251	9	10.99	1.45	0.81	27.1	18.7	1.60	.298	4.85	100	4.80	111	6.79	-2.8
11	Shaun Anderson S. Anderson	4.63	2021	TOT	16	0	0		0	8.49	19	0	0	0	23.1	36	22	30	4	12	2	6	1	124	3	7.33	1.58	1.54	15.3	9.7	2.06	.368	11.57	198	5.56	127	13.89	-2.9
12	Jake Arrieta J. Arrieta	4.01	2021	TOT	24	5	14	.263	24	7.39	83	0	0	0	98.2	131	81	91	24	44	6	0	3	469	3	7.57	1.89	2.19	17.7	9.4	1.77	.343	8.30	180	6.16	147	11.95	-21.8
13	Christian Arroyo C. Arroyo	9.00	2021	BOS	1	0	0		0	0.00	0	0	0	0	1.0	1	0	2	1	1	0	1	0	5	0	0.00	0.00	9.00	0.0	20.0	2.00	.000	18.00	0	19.16	444	9.00	-1.6
14	Willians Astudillo W. Astudillo	4.50	2021	MIN	4	0	0		0	2.25	0	0	0	0	4.0	1	1	1	1	2	0	4	0	16	0	0.00	0.00	2.25	0.0	12.5	0.75	.000	2.25	53	7.91	187	2.25	-1.7
15	Luis Avilan L. Avilan	5.40	2021	WSH	4	0	1	.000	0	12.60	4	0	0	0	5.0	7	7	7	1	3	1	0	0	27	0	7.20	1.33	1.80	14.8	11.1	2.00	.333	12.60	300	6.56	153	12.60	-1.3
16	John Axford J. Axford	27.00	2021	MIL	1	0	0		0	54.00	0	0	0	0	0.1	2	2	2	0	1	1	0	0	5	0	0.00	0.00	0.00	0.0	20.0	9.00	.667	54.00	1287	21.16	494	54.00	-0.6
17	Alberto Baldonado A. Baldonado	5.91	2021	WSH	14	0	1	.000	0	8.44	12	0	0	0	10.2	10	10	10	3	7	0	1	0	49	1	10.13	1.71	2.53	24.5	14.3	1.59	.259	8.44	201	6.54	153	8.44	-2.6
18	Daniel Bard D. Bard	4.93	2021	COL	67	7	8	.467	0	5.21	80	0	0	20	65.2	69	38	41	8	36	7	44	1	304	4	10.96	2.22	1.10	26.3	11.8	1.60	.353	5.62	108	4.27	96	9.46	1.4
19	Kyle Barraclough K. Barraclough	5.54	2021	MIN	10	2	0	1.000	0	5.54	18	0	0	0	13.0	12	8	8	4	8	2	2	0	60	0	12.46	2.25	2.77	30.0	13.3	1.54	.286	5.54	129	6.70	158	8.31	-3.6
20	Manny Barreda M. Barreda	6.75	2021	BAL	3	1	0	1.000	0	13.50	2	0	0	0	2.2	4	4	4	2	2	0	2	0	14	0	6.75	1.00	6.75	14.3	14.3	2.25	.250	13.50	306	13.66	301	13.50	-2.5
21	Mike Baumann M. Baumann	5.40	2021	BAL	4	1	1	.500	0	9.90	5	0	0	0	10.0	13	11	12	2	6	1	0	0	50	0	4.50	0.83	1.80	10.0	12.0	1.90	.306	10.80	225	6.86	151	11.70	-2.4
22	Cam Bedrosian C. Bedrosian	6.12	2021	TOT	26	0	0		1	5.04	23	0	0	0	25.0	27	14	14	6	17	0	8	0	116	0	8.28	1.35	2.16	19.8	14.7	1.76	.300	5.04	118	6.48	151	9.72	-6
23	Andrew Bellatti A. Bellatti	5.40	2021	MIA	3	0	0		0	13.50	4	0	0	0	3.1	6	5	5	0	2	0	0	0	19	0	10.80	2.00	0.00	21.1	10.5	2.40	.462	13.50	322	2.56	62	16.20	0.6
24	Wes Benjamin W. Benjamin	6.75	2021	TEX	13	0	2	.000	2	8.74	19	0	0	0	22.2	29	22	23	6	17	0	4	0	112	1	7.54	1.12	2.38	17.0	15.2	2.03	.329	9.13	198	7.18	163	11.51	-6.8
25	Dellin Betances D. Betances	9.00	2021	NYM	1	0	0		0	9.00	1	0	0	0	1.0	0	1	1	0	1	1	0	0	5	0	9.00	1.00	0.00	20.0	20.0	1.00	.000	9.00	226	7.16	171	0.00	-0.3