most walks per strikeout in a season by a pitcher since 1950

Since 1950, Gordie Mueller has the most walks allowed per strikeout in a season, with 13 in his rookie season in 1950.

	NAME	BB/SO	BB	SO	SEASON	TM	G	W	L	W%	GS	ERA	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	Gordie Mueller G. Mueller	13	13	1	1950	BSA	8	0	0		0	10.29	0	0	0	7.0	11	8	8	1	0	1		45	0	1.29	16.71	0.08	1.29	2.2	28.9	3.43	.333	10.29	212	9.73	206	14.14	-3.7
2	Bill White B. White	11	11	1	2008	TEX	8	0	0		0	20.25	0	0	0	4.0	7	9	9	1	0	2	1	30	0	2.25	24.75	0.09	2.25	3.3	36.7	4.50	.353	20.25	452	14.12	321	15.75	-4.2
3	Matt Smith M. Smith	11	11	1	2007	PHI	9	0	0		0	11.25	0	0	0	4.0	4	5	5	0	0	0	1	27	1	2.25	24.75	0.09	0.00	3.7	40.7	3.75	.267	11.25	247	10.98	240	9.00	-2.8
4	Kurt Knudsen K. Knudsen	11	11	1	1994	DET	4	1	0	1.000	0	13.50	0	0	0	5.1	7	8	8	2	0	0	1	34	0	1.69	18.56	0.09	3.38	2.9	32.4	3.38	.250	13.50	279	13.81	286	11.81	-5.2
5	Joe Slusarski J. Slusarski	11	11	1	1993	OAK	2	0	0		1	5.19	0	0	0	8.2	9	5	5	1	0	0	3	43	0	1.04	11.42	0.09	1.04	2.3	25.6	2.31	.267	5.19	128	8.05	189	9.35	-3.7
6	Frank Cimorelli F. Cimorelli	10	10	1	1994	STL	11	0	0		0	8.78	0	0	1	13.1	20	13	14	0	2	2	2	73	2	0.68	6.75	0.10	0.00	1.4	13.7	2.25	.333	9.45	210	5.67	134	13.50	-2.2
7	Marcelino Lopez M. Lopez	10	10	1	1972	CLE	4	0	0		2	5.40	0	0	0	8.1	8	5	5	0	0	0	0	40	3	1.08	10.80	0.10	0.00	2.5	25.0	2.16	.276	5.40	168	5.75	172	8.64	-2.1
8	John Kiely J. Kiely	9	9	1	1991	DET	7	0	1	.000	0	14.85	0	0	0	6.2	13	11	11	0	1	3	2	42	1	1.35	12.15	0.11	0.00	2.4	21.4	3.30	.419	14.85	359	7.05	169	17.55	-2.1
9	Carlos Maldonado C. Maldonado	9	9	1	1991	KCR	5	0	0		0	8.22	0	0	0	7.2	11	7	9	0	0	2	1	43	4	1.17	10.57	0.11	0.00	2.3	20.9	2.61	.333	10.57	201	6.11	157	12.91	-2
10	Pat Osburn P. Osburn	9	9	1	1975	MIL	6	0	1	.000	1	5.40	0	0	0	11.2	19	7	9	2	2	2	0	61	2	0.77	6.94	0.11	1.54	1.6	14.8	2.40	.362	6.94	144	7.46	198	14.66	-4.8
11	Jim Sadowski J. Sadowski	9	9	1	1974	PIT	4	0	1	.000	0	6.00	0	0	0	9.0	7	6	6	1	0	1	0	43	0	1.00	9.00	0.11	1.00	2.3	20.9	1.78	.188	6.00	171	6.79	188	7.00	-3.2
12	Leroy Heiser L. Heiser	9	9	1	1961	WSH	3	0	0		0	6.35	0	0	0	5.2	6	4	5	1	1	2	0	33	0	1.59	14.29	0.11	1.59	3.0	27.3	2.65	.238	7.94	161	9.81	244	9.53	-3.7
13	Bob Habenicht B. Habenicht	9	9	1	1951	SLN	3	0	0		0	7.20	0	0	0	5.0	5	4	4	0	0	0		27	0	1.80	16.20	0.11	0.00	3.7	33.3	2.80	.294	7.20	180	7.48	183	9.00	-1.9
14	Enrique Hernández E. Hernández	8	8	1	2025	LAD	5	0	0		0	15.19	0	0	0	5.1	11	9	11	1	0	3	0	37	1	1.69	13.50	0.13	1.69	2.7	21.6	3.56	.370	18.56	368	9.69	230	18.56	-3.2
15	Charlie Haeger C. Haeger	8	8	1	2007	CWS	8	0	1	.000	0	7.15	0	0	0	11.1	17	9	11	3	1	5	2	59	0	0.79	6.35	0.13	2.38	1.7	13.6	2.21	.304	8.74	154	8.88	191	13.50	-5
16	Shane Komine S. Komine	8	8	1	2006	OAK	2	0	0		2	5.00	0	0	0	9.0	10	5	5	3	0	0	1	45	0	1.00	8.00	0.13	3.00	2.2	17.8	2.00	.212	5.00	112	9.92	220	10.00	-5.4
17	Josh Pearce J. Pearce	8	8	1	2002	STL	3	0	0		3	7.62	0	0	0	13.0	20	11	13	1	1	0	0	66	0	0.69	5.54	0.13	0.69	1.5	12.1	2.15	.345	9.00	189	5.88	143	13.85	-2.6
18	Steve Montgomery S. Montgomery	8	8	1	1997	OAK	4	0	1	.000	0	9.95	0	0	0	6.1	10	7	7	2	0	0	2	35	0	1.42	11.37	0.13	2.84	2.9	22.9	2.84	.333	9.95	222	10.68	238	14.21	-4.4
19	Steve Dixon S. Dixon	8	8	1	1994	STL	2	0	0		0	23.14	0	0	0	2.1	3	6	6	0	0	0	0	18	0	3.86	30.86	0.13	0.00	5.6	44.4	4.71	.333	23.14	555	12.55	297	11.57	-2.2
20	Salome Barojas S. Barojas	8	8	1	1988	PHI	6	0	0		0	8.31	0	0	0	8.2	7	8	9	1	0	2	0	39	0	1.04	8.31	0.13	1.04	2.6	20.5	1.73	.207	9.35	236	6.80	194	7.27	-3.2
21	Joe Keener J. Keener	8	8	1	1976	MON	2	0	1	.000	2	10.38	0	0	0	4.1	7	5	7	0	1	0	0	27	1	2.08	16.62	0.13	0.00	3.7	29.6	3.46	.412	14.54	285	8.40	238	14.54	-2.3
22	Ken Kravec K. Kravec	8	8	1	1975	CWS	2	0	1	.000	1	6.23	0	0	0	4.1	1	3	3	0	0	0	0	22	0	2.08	16.62	0.13	0.00	4.5	36.4	2.08	.077	6.23	162	7.65	203	2.08	-1.9
23	Pedro Ramos P. Ramos	8	8	1	1967	PHI	6	0	0		0	9.00	0	0	0	8.0	14	8	8	1	2	4	1	46	0	1.13	9.00	0.13	1.13	2.2	17.4	2.75	.382	9.00	269	7.66	238	15.75	-4
24	Paul Brown P. Brown	8	8	1	1961	PHI	5	0	1	.000	1	8.10	0	0	0	10.0	13	9	9	3	1	1	0	50	0	0.90	7.20	0.13	2.70	2.0	16.0	2.10	.270	8.10	201	8.97	228	11.70	-5.6
25	Bob Ross B. Ross	7.5	15	2	1950	WSH	6	0	1	.000	2	8.53	0	0	0	12.2	15	12	12	1	0	4		69	2	1.42	10.66	0.13	0.71	2.9	21.7	2.37	.275	8.53	188	6.85	155	10.66	-3.5