lowest bb/9 in a season for a pitcher since 1950 with 40 innings

Since 1950, Carlos Silva has walked the lowest walks per nine innings with 40.0+ innings pitched in a season, with 0.43 BB/9 in 2005.

Interpreted as:

lowest bb/9 in a season for a pitcher since 1950 with 40 or more innings

	NAME	BB/9	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	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Carlos Silva C. Silva	0.43	188.1	2005	MIN	27	9	8	.529	27	3.44	71	2	0	0	212	72	83	25	9	3	0	2	749	0	3.39	7.89	1.19	9.5	1.2	1.17	.292	3.97	80	4.17	100	10.13	0.1
2	Dennis Eckersley D. Eckersley	0.47	57.2	1989	OAK	51	4	0	1.000	0	1.56	55	0	0	33	32	10	10	5	3	1	46	0	206	0	8.58	18.33	0.78	26.7	1.5	0.61	.190	1.56	43	2.18	60	4.99	9.6
3	Dennis Eckersley D. Eckersley	0.49	73.1	1990	OAK	63	4	2	.667	0	0.61	73	0	0	48	41	5	9	2	4	0	61	1	262	0	8.96	18.25	0.25	27.9	1.5	0.61	.213	1.10	17	1.33	35	5.03	20.6
4	Hal Brown H. Brown	0.51	141.1	1963	HOU	26	5	11	.313	20	3.31	68	6	3	0	137	52	54	14	8	0	2	0	563	0	4.33	8.50	0.89	12.1	1.4	1.03	.260	3.44	106	2.97	96	8.72	1.8
5	Bill Fischer B. Fischer	0.56	127.2	1962	KCA	34	4	12	.250	16	3.95	38	5	0	2	150	56	61	16	8	1	6	2	533	2	2.68	4.75	1.13	7.1	1.5	1.24	.285	4.30	95	3.86	90	10.57	5.9
6	Tom Morgan T. Morgan	0.57	62.2	1958	DET	39	2	5	.286	1	3.16	32	0	0	1	70	22	28	7	4	1	11	0	256	0	4.60	8.00	1.01	12.5	1.6	1.18	.297	4.02	81	3.14	80	10.05	5.3
7	Evan Scribner E. Scribner	0.60	60.0	2015	OAK	54	2	2	.500	0	4.35	64	0	0	0	58	29	31	14	4	2	14	0	238	2	9.60	16.00	2.10	26.9	1.7	1.03	.286	4.65	111	4.33	109	8.70	-2.6
8	Chris Martin C. Martin	0.61	44.1	2024	BOS	45	3	1	.750	0	3.45	50	0	0	2	47	17	22	5	3	3	9	1	180	2	10.15	16.67	1.02	27.8	1.7	1.13	.353	4.47	81	2.78	67	9.54	6.6
9	Gil Heredia G. Heredia	0.63	42.2	1998	OAK	8	3	3	.500	6	2.74	27	0	0	0	43	13	14	4	3	3	2	0	175	0	5.70	9.00	0.84	15.4	1.7	1.08	.283	2.95	60	3.51	78	9.07	4.8
10	Bret Saberhagen B. Saberhagen	0.66	177.1	1994	NYM	24	14	4	.778	24	2.74	143	4	0	0	169	54	58	13	13	4	0	0	696	0	7.26	11.00	0.66	20.5	1.9	1.03	.298	2.94	67	2.75	65	8.58	29.4
11	Clayton Kershaw C. Kershaw	0.66	149.0	2016	LAD	21	12	4	.750	21	1.69	172	3	3	0	97	28	31	8	11	2	0	1	544	5	10.39	15.64	0.48	31.6	2.0	0.72	.254	1.87	42	1.79	44	5.86	37.9
12	Brandon Walter B. Walter	0.67	53.2	2025	HOU	9	1	3	.250	9	3.35	52	0	0	0	46	20	20	10	4	3	0	0	212	0	8.72	13.00	1.68	24.5	1.9	0.93	.252	3.35	84	3.98	97	7.71	0.8
13	Wilton Lopez W. Lopez	0.67	67.0	2010	HOU	68	5	2	.714	0	2.96	50	0	0	1	66	22	23	4	5	0	14	1	262	2	6.72	10.00	0.54	19.1	1.9	1.06	.305	3.09	74	2.58	64	8.87	10.7
14	Phil Hughes P. Hughes	0.69	209.2	2014	MIN	32	16	10	.615	32	3.52	186	1	0	0	221	82	88	16	16	5	0	1	855	1	7.98	11.63	0.69	21.8	1.9	1.13	.324	3.78	90	2.65	69	9.49	27.2
15	Edward Mujica E. Mujica	0.70	64.2	2013	STL	65	2	1	.667	0	2.78	46	0	0	37	60	20	20	9	5	1	49	1	255	0	6.40	9.20	1.25	18.0	2.0	1.01	.263	2.78	76	3.71	100	8.35	0.1
16	Dan Quisenberry D. Quisenberry	0.71	139.0	1983	KCR	69	5	3	.625	0	1.94	48	0	0	45	118	30	35	6	11	0	62	2	536	0	3.11	4.36	0.39	9.0	2.1	0.93	.238	2.27	48	2.85	73	7.64	16.6
17	Kevin Slowey K. Slowey	0.76	59.1	2011	MIN	14	0	8	.000	8	6.67	34	0	0	0	78	44	44	10	5	3	1	0	258	0	5.16	6.80	1.52	13.2	1.9	1.40	.330	6.67	162	4.47	112	11.83	-3.1
18	Cliff Lee C. Lee	0.76	212.1	2010	TOT	28	12	9	.571	28	3.18	185	7	1	0	195	75	84	16	18	1	0	2	843	3	7.84	10.28	0.68	21.9	2.1	1.00	.287	3.56	75	2.58	61	8.27	38.1
19	Mariano Rivera M. Rivera	0.76	70.2	2008	NYY	64	6	5	.545	0	1.40	77	0	0	39	41	11	11	4	6	2	60	0	259	1	9.81	12.83	0.51	29.7	2.3	0.67	.218	1.40	32	2.02	47	5.22	18
20	Jon Lieber J. Lieber	0.77	141.0	2002	CHC	21	6	8	.429	21	3.70	87	3	0	0	153	58	64	15	12	1	0	2	582	0	5.55	7.25	0.96	14.9	2.1	1.17	.296	4.09	92	3.38	81	9.77	12.7
21	Dan Otero D. Otero	0.77	58.2	2018	CLE	61	2	1	.667	0	5.22	43	0	0	1	69	34	36	12	5	3	19	3	247	0	6.60	8.60	1.84	17.4	2.0	1.26	.310	5.52	119	4.76	113	10.59	-3.4
22	Tyler Rogers T. Rogers	0.77	70.1	2024	SFG	77	3	4	.429	0	2.82	51	0	0	1	67	22	23	7	6	7	13	2	290	1	6.53	8.50	0.90	17.6	2.1	1.04	.274	2.94	70	3.56	91	8.57	2.6
23	Zach Neal Z. Neal	0.77	70.0	2016	OAK	24	2	4	.333	6	4.24	27	0	0	2	72	33	35	9	6	1	7	0	281	2	3.47	4.50	1.16	9.6	2.1	1.11	.265	4.50	103	4.34	104	9.26	-1.5
24	Bob Tewksbury B. Tewksbury	0.77	233.0	1992	STL	33	16	5	.762	32	2.16	91	5	0	0	217	56	63	15	20	3	1	0	915	2	3.52	4.55	0.58	9.9	2.2	1.02	.257	2.43	62	3.13	89	8.38	9.9
25	Greg Maddux G. Maddux	0.77	232.2	1997	ATL	33	19	4	.826	33	2.20	177	5	2	0	200	57	58	9	20	6	0	6	893	0	6.85	8.85	0.35	19.8	2.2	0.95	.280	2.24	53	2.42	58	7.74	46.2