Lady Baldwin has allowed the fewest walks in a season, with 1 allowed in his rookie season in 1884.

Interpreted as:

least walks with a minimum of 1 IP per team game by pitcher in season

	NAME	BB	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Lady Baldwin L. Baldwin	1	1884	MIL	2	1	1	.500	2	2.65	21	2	0	0	17.0	7	5	5	0		0		61	0	11.12	0.53	21.00	0.00	34.4	1.6	0.47		2.65	20	0.98	9	3.71	8.2
2	Ed Cushman E. Cushman	3	1884	MIL	4	4	0	1.000	4	1.00	47	4	2	0	36.0	10	4	4	0		0		125	1	11.75	0.75	15.67	0.00	37.6	2.4	0.36		1.00	8	0.91	8	2.50	17.4
3	Dan Casey D. Casey	4	1884	WIL	2	1	1	.500	2	1.00	10	2	0	0	18.0	23	2	17	0		0		83	0	5.00	2.00	2.50	0.00	12.0	4.8	1.50		8.50	32	2.83	104	11.50	-0.1
4	Dale Williams D. Williams	4	1876	CIN	9	1	8	.111	9	4.23	9	9	0	0	83.0	123	39	75	1		0		367	5	0.98	0.43	2.25	0.11	2.5	1.1	1.53		8.13	193	2.32	106	13.34	-2.9
5	Guy Hecker G. Hecker	5	1882	LOU	13	6	6	.500	11	1.30	33	10	0	0	104.0	75	15	49	0		1		403	7	2.86	0.43	6.60	0.00	8.2	1.2	0.77		4.24	49	2.27	82	6.49	5.1
6	George Bradley G. Bradley	6	1880	PRO	28	13	8	.619	20	1.38	54	16	4	2	196.0	158	30	66	2		7		757	7	2.48	0.28	9.00	0.09	7.1	0.8	0.84		3.03	60	2.21	96	7.26	0.6
7	Cherokee Fisher C. Fisher	6	1876	CIN	28	4	20	.167	24	3.02	29	22	0	0	229.1	294	77	206	6		4		1,039	6	1.14	0.24	4.83	0.24	2.8	0.6	1.31		8.08	138	2.40	109	11.54	-10.3
8	George Zettlein G. Zettlein	6	1876	PHI	28	4	20	.167	25	3.88	10	23	1	2	234.0	358	101	212	2		4		1,089	4	0.38	0.23	1.67	0.08	0.9	0.6	1.56		8.15	159	2.34	96	13.77	7.9
9	Marco Gonzales M. Gonzales	7	2020	SEA	11	7	2	.778	11	3.10	64	1	0	0	69.2	59	24	27	8	4	0	0	277	0	8.27	0.90	9.14	1.03	23.1	2.5	0.95	.263	3.49	74	3.31	77	7.62	7.9
10	The Only Nolan T. Only Nolan	7	1884	WIL	5	1	4	.200	5	2.93	52	5	0	0	40.0	44	13	28	1		0		175	13	11.70	1.58	7.43	0.23	29.7	4.0	1.27		6.30	93	1.52	56	9.90	5.5
11	Kyle Hendricks K. Hendricks	8	2020	CHC	12	6	5	.545	12	2.88	64	1	1	0	81.1	73	26	26	10	1	0	1	315	1	7.08	0.89	8.00	1.11	20.3	2.5	1.00	.272	2.88	65	3.54	80	8.08	7.8
12	Tricky Nichols T. Nichols	8	1878	PRO	11	4	7	.364	10	4.22	21	10	0	0	98.0	157	46	98	0		1		464	9	1.93	0.73	2.63	0.00	4.5	1.7	1.68		9.00	189	2.35	105	14.42	-2.3
13	Zack Greinke Z. Greinke	9	2020	HOU	12	3	3	.500	12	4.03	67	0	0	0	67.0	67	30	30	6	1	0	0	273	3	9.00	1.21	7.44	0.81	24.5	3.3	1.13	.321	4.03	92	2.79	64	9.00	12
14	Carlos Silva C. Silva	9	2005	MIN	27	9	8	.529	27	3.44	71	2	0	0	188.1	212	72	83	25	3	0	2	749	0	3.39	0.43	7.89	1.19	9.5	1.2	1.17	.292	3.97	80	4.17	100	10.13	0.1
15	Henry Porter H. Porter	9	1884	MIL	6	3	3	.500	6	3.00	71	6	1	0	51.0	32	17	25	1		0		200	6	12.53	1.59	7.89	0.18	35.5	4.5	0.80		4.41	23	1.27	11	5.65	24.1
16	Stump Wiedman S. Wiedman	9	1880	BUF	17	0	9	.000	13	3.40	25	9	0	0	113.2	141	43	77	1		4		493	9	1.98	0.71	2.78	0.08	5.1	1.8	1.32		6.10	141	2.44	101	11.16	0.3
17	Kenta Maeda K. Maeda	10	2020	MIN	11	6	1	.857	11	2.70	80	0	0	0	66.2	40	20	20	9	0	0	0	248	0	10.80	1.35	8.00	1.21	32.3	4.0	0.75	.208	2.70	62	2.99	68	5.40	10.5
18	Mike O'Rourke M. O'Rourke	10	1890	BAL	5	1	2	.333	5	3.95	8	5	0	0	41.0	45	18	19	0	3	0		179	0	1.76	2.20	0.80	0.00	4.5	5.6	1.34	.285	4.17	97	3.48	91	9.88	2
19	Henry Boyle H. Boyle	10	1884	SLU	19	15	3	.833	16	1.74	88	16	2	1	150.0	118	29	63	3		3		595	3	5.28	0.60	8.80	0.18	14.8	1.7	0.85		3.78	59	2.56	100	7.08	-1.1
20	Lou Galvin L. Galvin	10	1884	STP	3	0	2	.000	3	2.88	17	3	0	0	25.0	21	8	18	0		0		109	2	6.12	3.60	1.70	0.00	15.6	9.2	1.24		6.48	135	3.11	168	7.56	-8
21	Peek-A-Boo Veach P. Veach	10	1884	KCC	12	3	9	.250	12	2.42	62	12	0	0	104.0	95	28	57	1		0		429	10	5.37	0.87	6.20	0.09	14.5	2.3	1.01		4.93	85	2.50	100	8.22	-1.9
22	John Murphy J. Murphy	11	1884	TOT	21	5	12	.294	16	3.61	73	15	0	0	159.2	193	64	126	6		5		700	5	4.11	0.62	6.64	0.34	10.4	1.6	1.28		7.10	114	3.05	111	10.88	-3.7
23	Sam Weaver S. Weaver	11	1884	PHU	17	5	10	.333	17	5.76	40	14	0	0	136.0	206	87	146	3		0		640	12	2.65	0.73	3.64	0.20	6.3	1.7	1.60		9.66	193	3.22	124	13.63	-10.3
24	Harry Salisbury H. Salisbury	11	1879	TRO	10	4	6	.400	10	2.22	31	9	0	0	89.0	103	22	72	0		0		400	8	3.13	1.11	2.82	0.00	7.8	2.8	1.28		7.28	90	2.41	98	10.42	0.3
25	Cal McVey C. McVey	11	1877	CWS	17	4	8	.333	10	4.50	20	6	0	2	92.0	129	46	87	2		6		439	3	1.96	1.08	1.82	0.20	4.6	2.5	1.52		8.51	154	3.05	104	12.62	-0.1