which player has the most k/9 divided by bb/9 in a single season since 1950

9 in a season, with 25 in his rookie season in 2019.

	NAME	K/9/BB/9	K/9	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/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Cody Stashak C. Stashak	25	9.00	0.36	2019	MIN	18	0	1	.000	1	3.24	25	0	0	0	25.0	29	9	9	3	1	1	4	0	104	0	25.00	1.08	24.0	1.0	1.20	.351	3.24	70	3.00	66	10.44	4.3
2	Tommy Milone T. Milone	23	7.86	0.34	2018	WSH	5	1	1	.500	4	5.81	23	0	0	0	26.1	37	17	17	7	1	1	1	0	118	0	23.00	2.39	19.5	0.8	1.44	.349	5.81	142	5.09	123	12.65	-2.7
3	Julio Navarro J. Navarro	21	7.18	0.34	1970	ATL	17	0	0		0	4.10	21	0	0	1	26.1	24	12	12	7	1	1	10	0	105	1	21.00	2.39	20.0	1.0	0.95	.227	4.10	98	4.72	119	8.20	-2.1
4	Shane Bieber S. Bieber	20	15.00	0.75	2024	CLE	2	2	0	1.000	2	0.00	20	0	0	0	12.0	10	0	0	0	1	0	0	0	45	0	20.00	0.00	44.4	2.2	0.92	.417	0.00	0	0.08	2	7.50	5.3
5	Dennis Eckersley D. Eckersley	18.33	8.58	0.47	1989	OAK	51	4	0	1.000	0	1.56	55	0	0	33	57.2	32	10	10	5	3	1	46	0	206	0	18.33	0.78	26.7	1.5	0.61	.190	1.56	43	2.18	60	4.99	9.6
6	Dennis Eckersley D. Eckersley	18.25	8.96	0.49	1990	OAK	63	4	2	.667	0	0.61	73	0	0	48	73.1	41	5	9	2	4	0	61	1	262	0	18.25	0.25	27.9	1.5	0.61	.213	1.10	17	1.33	35	5.03	20.6
7	Scott Effross S. Effross	18	11.05	0.61	2021	CHC	14	2	1	.667	0	3.68	18	0	0	0	14.2	13	6	6	2	1	3	2	0	58	1	18.00	1.23	31.0	1.7	0.95	.324	3.68	89	3.30	79	7.98	1.5
8	Randy Rodríguez R. Rodríguez	18	11.85	0.66	2025	SFG	13	1	0	1.000	0	1.32	18	0	0	0	13.2	9	2	2	1	1	1	1	0	52	0	18.00	0.66	34.6	1.9	0.73	.258	1.32	33	1.81	47	5.93	3.2
9	Chris Martin C. Martin	16.67	10.15	0.61	2024	BOS	45	3	1	.750	0	3.45	50	0	0	2	44.1	47	17	22	5	3	3	9	1	180	2	16.67	1.02	27.8	1.7	1.13	.353	4.47	81	2.78	67	9.54	6.6
10	Liam Hendriks L. Hendriks	16.14	14.32	0.89	2021	CWS	69	8	3	.727	0	2.54	113	0	0	38	71.0	45	20	23	11	7	1	58	1	267	6	16.14	1.39	42.3	2.6	0.73	.252	2.92	58	2.33	52	5.70	16.2
11	Robert Gasser R. Gasser	16	5.14	0.32	2024	MIL	5	2	0	1.000	5	2.57	16	0	0	0	28.0	28	8	9	2	1	3	0	0	114	0	16.00	0.64	14.0	0.9	1.04	.283	2.89	62	3.37	82	9.00	2.2
12	Evan Scribner E. Scribner	16	9.60	0.60	2015	OAK	54	2	2	.500	0	4.35	64	0	0	0	60.0	58	29	31	14	4	2	14	0	238	2	16.00	2.10	26.9	1.7	1.03	.286	4.65	111	4.33	109	8.70	-2.6
13	Clayton Kershaw C. Kershaw	15.64	10.39	0.66	2016	LAD	21	12	4	.750	21	1.69	172	3	3	0	149.0	97	28	31	8	11	2	0	1	544	5	15.64	0.48	31.6	2.0	0.72	.254	1.87	42	1.79	44	5.86	37.9
14	Kenley Jansen K. Jansen	15.57	14.36	0.92	2017	LAD	65	5	0	1.000	0	1.32	109	0	0	41	68.1	44	10	11	5	7	2	57	0	258	2	15.57	0.66	42.2	2.7	0.75	.289	1.45	32	1.31	31	5.80	22.6
15	Nathan Eovaldi N. Eovaldi	15.33	9.70	0.63	2025	TEX	7	2	2	.500	7	2.11	46	1	1	0	42.2	30	10	12	3	3	4	0	0	163	2	15.33	0.63	28.2	1.8	0.77	.252	2.53	54	2.30	56	6.33	8.5
16	Manuel Rodríguez M. Rodríguez	15	9.64	0.64	2025	TBR	14	0	0		0	1.93	15	0	0	0	14.0	11	3	4	1	1	1	2	0	54	1	15.00	0.64	27.8	1.9	0.86	.278	2.57	51	2.27	58	7.07	2.6
17	Brent Suter B. Suter	15	7.36	0.49	2019	MIL	9	4	0	1.000	0	0.49	15	0	0	0	18.1	10	1	1	1	1	0	0	0	65	0	15.00	0.49	23.1	1.5	0.60	.188	0.49	11	2.44	55	4.91	4
18	Masanori Murakami M. Murakami	15	9.00	0.60	1964	SFG	9	1	0	1.000	0	1.80	15	0	0	1	15.0	8	3	3	1	1	0	5	0	53	0	15.00	0.60	28.3	1.9	0.60	.194	1.80	51	1.67	49	4.80	2.9
19	Chris Martin C. Martin	14.8	11.89	0.80	2022	TOT	60	4	1	.800	0	3.05	74	0	0	2	56.0	50	19	20	6	5	1	6	1	225	7	14.80	0.96	32.9	2.2	0.98	.317	3.21	77	2.18	55	8.04	11.2
20	Koji Uehara K. Uehara	14.33	10.75	0.75	2012	TEX	37	0	0		0	1.75	43	0	0	1	36.0	20	7	7	4	3	0	13	0	130	1	14.33	1.00	33.1	2.3	0.64	.200	1.75	40	2.39	56	5.00	7.3
21	Jacob deGrom J. deGrom	14	11.81	0.84	2024	TEX	3	0	0		3	1.69	14	0	0	0	10.2	11	2	2	1	1	1	0	0	44	0	14.00	0.84	31.8	2.3	1.13	.370	1.69	42	2.32	56	9.28	2.2
22	David Hale D. Hale	14	11.45	0.82	2013	ATL	2	1	0	1.000	2	0.82	14	0	0	0	11.0	11	1	1	0	1	0	0	0	46	0	14.00	0.00	30.4	2.2	1.09	.355	0.82	22	0.77	21	9.00	3.6
23	Sergio Romo S. Romo	14	13.13	0.94	2011	SFG	65	3	1	.750	0	1.50	70	0	0	1	48.0	29	8	8	2	5	0	16	1	175	0	14.00	0.38	40.0	2.9	0.71	.276	1.50	42	0.96	26	5.44	15.1
24	Dennis Sarfate D. Sarfate	14	15.12	1.08	2007	HOU	7	1	0	1.000	0	1.08	14	0	0	0	8.1	5	1	1	0	1	0	1	0	31	0	14.00	0.00	45.2	3.2	0.72	.313	1.08	25	0.23	5	5.40	3.9
25	Andrew Miller A. Miller	13.67	14.89	1.09	2016	TOT	70	10	1	.909	0	1.45	123	0	0	12	74.1	42	12	13	8	9	2	23	0	275	1	13.67	0.97	44.7	3.3	0.69	.256	1.57	34	1.67	38	5.09	21.7