David Wells has walked the worst walks per nine innings for the Yankees in a season, with 0.85 BB/9 in 2003.

Interpreted as:

lowest bb/9 with a minimum of 0.5 IP per team game season pitcher yankees

	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	David Wells D. Wells	0.85	2003	NYY	31	15	7	.682	30	4.14	101	4	1	0	213.0	242	98	101	24	20	8	0	0	887	3	4.27	5.05	1.01	11.4	2.3	1.23	.297	4.27	92	3.94	88	10.23	12.4
2	Jon Lieber J. Lieber	0.92	2004	NYY	27	14	8	.636	27	4.33	102	0	0	0	176.2	216	85	95	20	18	2	0	2	749	7	5.20	5.67	1.02	13.6	2.4	1.32	.323	4.84	95	3.70	83	11.00	15.3
3	Tiny Bonham T. Bonham	0.96	1942	NYY	28	21	5	.808	27	2.27	71	22	6	0	226.0	199	57	65	11	24	1	1		872	1	2.83	2.96	0.44	8.1	2.8	0.99	.246	2.59	63	2.75	80	7.92	17.6
4	Tiny Bonham T. Bonham	1.10	1945	NYY	23	8	11	.421	23	3.29	42	12	0	0	180.2	186	66	72	11	22	1	0		736	0	2.09	1.91	0.55	5.7	3.0	1.15	.265	3.59	98	3.25	94	9.27	4.3
5	Bill Monbouquette B. Monbouquette	1.15	1967	NYY	33	6	5	.545	10	2.36	53	2	1	1	133.1	122	35	39	6	17	4	4	7	526	2	3.58	3.12	0.41	10.1	3.2	1.04	.260	2.63	75	2.80	86	8.24	6.6
6	Herb Pennock H. Pennock	1.15	1930	NYY	25	11	7	.611	19	4.32	46	11	1	0	156.1	194	75	95	8	20	0	3		676	4	2.65	2.30	0.46	6.8	3.0	1.37	.309	5.47	98	3.96	89	11.17	8.4
7	Michael Pineda M. Pineda	1.18	2015	NYY	27	12	10	.545	27	4.37	156	1	0	0	160.2	176	78	83	21	21	3	0	0	668	4	8.74	7.43	1.18	23.4	3.1	1.23	.332	4.65	108	3.33	79	9.86	15.1
8	Tiny Bonham T. Bonham	1.18	1940	NYY	12	9	3	.750	12	1.90	37	10	3	0	99.1	83	21	24	4	13	0	0		386	0	3.35	2.85	0.36	9.6	3.4	0.97	.238	2.17	45	3.01	73	7.52	12.5
9	Rudy May R. May	1.19	1982	NYY	41	6	6	.500	6	2.89	85	0	0	3	106.0	109	34	43	4	14	1	22	5	438	2	7.22	6.07	0.34	19.4	3.2	1.16	.314	3.65	73	2.02	51	9.25	23.6
10	David Wells D. Wells	1.22	1998	NYY	30	18	4	.818	30	3.49	163	8	5	0	214.1	195	83	86	29	29	1	0	0	851	2	6.84	5.62	1.22	19.2	3.4	1.05	.264	3.61	77	3.79	84	8.19	17.5
11	Fritz Peterson F. Peterson	1.23	1968	NYY	36	12	11	.522	27	2.63	115	6	2	0	212.1	187	62	72	13	29	4	3	9	833	2	4.87	3.97	0.55	13.8	3.5	1.02	.259	3.05	93	2.56	86	7.93	9.9
12	Al Orth A. Orth	1.24	1904	NYH	20	11	6	.647	18	2.68	47	11	2	0	137.2	122	41	47	0	19	3	2		534	4	3.07	2.47	0.00	8.8	3.6	1.02	.262	3.07	96	2.22	82	7.98	8.3
13	Scott Sanderson S. Sanderson	1.25	1991	NYY	34	16	10	.615	34	3.81	130	2	2	0	208.0	200	88	95	22	29	3	0	0	837	4	5.63	4.48	0.95	15.5	3.5	1.10	.273	4.11	93	3.44	83	8.65	15.7
14	Rick Reuschel R. Reuschel	1.27	1981	NYY	12	4	4	.500	11	2.67	22	3	0	0	70.2	75	21	24	4	10	1	1	0	282	0	2.80	2.20	0.51	7.8	3.5	1.20	.290	3.06	75	3.18	87	9.55	3.7
15	Jesse Tannehill J. Tannehill	1.28	1903	NYH	32	15	15	.500	31	3.27	106	22	2	0	239.2	258	87	123	3	34	10	1		985	3	3.98	3.12	0.11	10.8	3.5	1.22	.306	4.62	102	2.58	81	9.69	17.4
16	Brandon McCarthy B. McCarthy	1.30	2014	NYY	14	7	5	.583	14	2.89	82	1	1	0	90.1	91	29	35	10	13	1	0	0	370	1	8.17	6.31	1.00	22.2	3.5	1.15	.307	3.49	75	3.22	82	9.07	7.1
17	Bill Monbouquette B. Monbouquette	1.31	1968	NYY	17	5	7	.417	11	4.43	32	2	0	0	89.1	92	44	47	7	13	3	2	2	370	0	3.22	2.46	0.71	8.6	3.5	1.18	.270	4.74	157	3.22	108	9.27	-2.8
18	Ralph Terry R. Terry	1.31	1963	NYY	40	17	15	.531	37	3.22	114	18	3	1	268.0	246	96	103	29	39	4	2	1	1,074	1	3.83	2.92	0.97	10.6	3.6	1.06	.244	3.46	92	3.52	99	8.26	0.2
19	John Candelaria J. Candelaria	1.32	1988	NYY	25	13	7	.650	24	3.38	121	6	2	1	157.0	150	59	69	18	23	2	1	2	640	2	6.94	5.26	1.03	18.9	3.6	1.10	.277	3.96	85	3.19	81	8.60	12.7
20	Clark Griffith C. Griffith	1.33	1905	NYH	25	9	6	.600	7	1.68	46	4	2	1	101.2	82	19	30	1	15	1	17		384	3	4.07	3.07	0.09	12.0	3.9	0.95	.252	2.66	59	2.22	76	7.26	8.4
21	Mariano Rivera M. Rivera	1.34	2001	NYY	71	4	6	.400	0	2.34	83	0	0	50	80.2	61	21	24	5	12	1	66	2	310	1	9.26	6.92	0.56	26.8	3.9	0.90	.268	2.68	53	2.27	51	6.81	19.3
22	Fritz Peterson F. Peterson	1.38	1971	NYY	37	15	13	.536	35	3.05	139	16	4	1	274.0	269	93	106	25	42	4	2	7	1,104	6	4.57	3.31	0.82	12.6	3.8	1.14	.273	3.48	93	3.12	92	8.84	7.5
23	Fritz Peterson F. Peterson	1.38	1970	NYY	39	20	11	.645	37	2.90	127	8	2	0	260.1	247	84	102	24	40	3	0	6	1,051	2	4.39	3.18	0.83	12.1	3.8	1.10	.260	3.53	82	3.35	90	8.54	10.7
24	Masahiro Tanaka M. Tanaka	1.39	2014	NYY	20	13	5	.722	20	2.77	141	3	1	0	136.1	123	42	47	15	21	4	0	0	542	4	9.31	6.71	0.99	26.0	3.9	1.06	.299	3.10	72	3.04	77	8.12	13.3
25	Mike Mussina M. Mussina	1.39	2008	NYY	34	20	9	.690	34	3.37	150	0	0	0	200.1	214	75	85	17	31	8	0	3	819	4	6.74	4.84	0.76	18.3	3.8	1.22	.321	3.82	78	3.31	77	9.61	22.3