Tommy Byrne and Bruno Haas are tied for allowing the most walks in a game, with 16 allowed.

Interpreted as:

most walks by pitcher in a single regular-season game

	NAME	BB	DATE	TM		OPP	DEC	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	HBP	GF	IBB	TBF	WP
1	Tommy Byrne T. Byrne	16	8/22/1951	SLA	vs	BSA	L	1	2.13	5	0	0	0	12.2	11	3	3	0	0	0	0	63	0
2	Bruno Haas B. Haas	16	6/23/1915	PHA	vs	NYY	L	1	8.00	4	1	0	0	9.0	13	8	15	0	0	0		53	3
3	Boardwalk Brown B. Brown	15	7/12/1913	PHA	@	DET	W	1	5.87	3	0	0	0	7.2	10	5	5	0	0	0		42	0
4	Skipper Friday S. Friday	14	6/17/1923	WSH	vs	CWS	L	1	4.09	4	1	0	0	11.0	4	5	5	0	1	0		47	0
5	Henry Mathewson H. Mathewson	14	10/5/1906	NYG	vs	BSN	L	1		2	1	0	0	9.0	6		7	0	1	0		46	0
6	Bud Podbielan B. Podbielan	13	5/18/1953	CIN	vs	BKN	W	1	0.90	4	1	0	0	10.0	6	1	1	0	1	0	2	49	1
7	Tommy Byrne T. Byrne	13	8/28/1951	SLA	vs	NYY	L	1	3.60	7	1	0	0	10.0	9	4	7	0	0	0	0	51	1
8	Dick Weik D. Weik	13	9/1/1949	WSH	@	CWS	L	1	2.57	7	0	0	0	7.0	3	2	3	0	0	0		36	1
9	Tommy Byrne T. Byrne	13	6/8/1949	NYY	@	DET	L	1	2.53	6	1	0	0	10.2	4	3	3	0	1	0		49	0
10	George Turbeville G. Turbeville	13	8/24/1935	PHA	@	CLE	L	1	1.23	6	1	0	0	14.2	9	2	2	1	0	0		56	3
11	Pete Schneider P. Schneider	13	7/6/1918	CIN	vs	PHN	W	1	6.75	1	0	0	0	8.0	1	6	6	0	0	0		38	1
12	Jack Fisher J. Fisher	12	8/30/1961	BAL	@	LAA	W	1	4.00	5	1	0	0	9.0	7	4	4	1	0	0	0	44	1
13	Stan Williams S. Williams	12	5/17/1961	LAD	vs	MIL	W	1	0.82	11	1	0	0	11.0	4	1	1	0	0	0	2	49	0
14	Bob Turley B. Turley	12	7/25/1954	BAL	@	PHA		1	2.70	5	0	0	0	6.2	4	2	2	0	0	0	0	35	1
15	Curt Simmons C. Simmons	12	9/6/1948	PHN	vs	NYG	L	1	4.26	3	0	0	0	6.1	4	3	3	0	0	0		35	0
16	Sid Hudson S. Hudson	12	8/7/1948	WSH	@	DET		1	2.08	0	0	0	0	8.2	6	2	2	0	0	0		43	0
17	Bill Kennedy B. Kennedy	12	6/21/1948	SLA	vs	PHA		1	5.68	5	0	0	0	6.1	5	4	6	0	0	0		35	1
18	Johnny Vander Meer J. Vander Meer	12	4/21/1948	CIN	@	SLN	L	1	6.14	1	0	0	0	7.1	6	5	5	0	0	0		39	0
19	Vallie Eaves V. Eaves	12	4/22/1940	CWS	vs	DET		1	3.52	7	0	0	0	7.2	7	3	4	0	0	0		39	2
20	Bobo Newsom B. Newsom	12	8/27/1935	WSH	@	SLA	L	1	12.38	3	1	0	0	8.0	9	11	11	0	1	0		43	1
21	Fritz Ostermueller F. Ostermueller	12	7/30/1935	BSA	@	WSH	W	1	4.00	2	1	0	0	9.0	4	4	4	0	1	0		44	0
22	Bobby Burke B. Burke	12	5/3/1932	WSH	vs	NYY		1	1.35	3	0	0	0	6.2	4	1	1	0	0	0		35	0
23	Tommy Bridges T. Bridges	12	8/25/1930	DET	vs	SLA	W	1	5.19	3	0	0	0	8.2	7	5	5	0	0	0		41	0
24	Bob Smith B. Smith	12	9/28/1928	BSN	vs	SLN	L	1	1.88	3	0	0	0	14.1	9	3	10	0	0	0		66	0
25	Sam Gibson S. Gibson	12	7/13/1927	DET	vs	WSH	W	1	2.25	2	0	0	0	8.0	9	2	3	1	0	0		42	0