single season strikeouts per 9 leaders from 1901 to 1997 minimum 8 innings pitched

Between the 1901 and 1997 seasons, Billy Wagner had the highest K/9 with 8.0+ innings pitched in a season, with 14.38 per nine innings in 1997.

	NAME	K/9	IP	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Billy Wagner B. Wagner	14.38	66.1	1997	HOU	62	7	8	.467	0	2.85	106	0	0	23	49	21	23	5	30	3	49	1	277	3	4.07	3.53	0.68	38.3	10.8	1.19	.331	3.12	72	2.38	60	6.65	12.4
2	Rob Dibble R. Dibble	14.08	70.1	1992	CIN	63	3	5	.375	0	3.07	110	0	0	25	48	24	26	3	31	2	49	2	286	6	3.97	3.55	0.38	38.5	10.8	1.12	.321	3.33	86	1.61	44	6.14	15.4
3	Rob Dibble R. Dibble	13.55	82.1	1991	CIN	67	3	5	.375	0	3.17	124	0	0	31	67	29	32	5	25	0	57	2	334	5	2.73	4.96	0.55	37.1	7.5	1.12	.344	3.50	84	1.54	39	7.32	20.9
4	Karl Spooner K. Spooner	13.50	18.0	1954	BKN	2	2	0	1.000	2	0.00	27	2	2	0	7	0	0	0	6	0	0		68	0	3.00	4.50	0.00	39.7	8.8	0.72	.200	0.00	0	0.40	10	3.50	7.3
5	John Hudek J. Hudek	13.05	20.0	1995	HOU	19	2	2	.500	0	5.40	29	0	0	7	19	12	12	3	5	0	16	0	83	2	2.25	5.80	1.35	34.9	6.0	1.20	.348	5.40	137	2.90	72	8.55	2.5
6	Armando Benitez A. Benitez	13.01	73.1	1997	BAL	71	4	5	.444	0	2.45	106	0	0	9	49	20	22	7	43	1	26	5	307	1	5.28	2.47	0.86	34.5	14.0	1.25	.280	2.70	55	3.25	72	6.01	10.4
7	Enrique Burgos E. Burgos	12.96	8.1	1995	SFG	5	0	0		0	8.64	12	0	0	0	14	8	8	1	6	1	2	0	44	2	6.48	2.00	1.08	27.3	13.6	2.40	.542	8.64	213	4.30	103	15.12	-0.1
8	Rob Dibble R. Dibble	12.82	99.0	1989	CIN	74	10	5	.667	0	2.09	141	0	0	2	62	23	23	4	39	3	18	11	401	7	3.55	3.62	0.36	35.2	9.7	1.02	.271	2.09	58	1.70	45	5.64	21.9
9	Bryan Harvey B. Harvey	12.76	55.0	1989	CAL	51	3	3	.500	0	3.44	78	0	0	25	36	21	21	6	41	0	42	1	245	5	6.71	1.90	0.98	31.8	16.7	1.40	.250	3.44	91	3.57	92	5.89	1.8
10	Bruce Ruffin B. Ruffin	12.68	22.0	1997	COL	23	0	2	.000	0	5.32	31	0	0	7	18	13	15	3	18	0	15	0	102	2	7.36	1.72	1.23	30.4	17.6	1.64	.300	6.14	103	4.51	96	7.36	0.5
11	Roberto Hernandez R. Hernandez	12.67	59.2	1995	CWS	60	3	7	.300	0	3.92	84	0	0	32	63	26	30	9	28	3	57	4	272	1	4.22	3.00	1.36	30.9	10.3	1.53	.365	4.53	87	3.80	83	9.50	5.2
12	Rich DeLucia R. DeLucia	12.66	10.2	1994	CIN	8	0	0		0	4.22	15	0	0	0	9	5	6	4	5	0	2	0	47	1	4.22	3.00	3.38	31.9	10.6	1.31	.217	5.06	100	6.59	153	7.59	-2.7
13	Ron Villone R. Villone	12.60	45.0	1995	TOT	38	2	3	.400	0	5.80	63	0	0	1	44	29	31	11	34	1	15	0	212	3	6.80	1.85	2.20	29.7	16.0	1.73	.320	6.20	131	5.81	130	8.80	-7
14	Armando Benitez A. Benitez	12.60	10.0	1994	BAL	3	0	0		0	0.90	14	0	0	0	8	1	1	0	4	1	1	0	42	0	3.60	3.50	0.00	33.3	9.5	1.20	.348	0.90	19	1.82	38	7.20	3.3
15	Armando Benitez A. Benitez	12.56	14.1	1996	BAL	18	1	0	1.000	0	3.77	20	0	0	4	7	6	6	2	6	0	8	0	56	1	3.77	3.33	1.26	35.7	10.7	0.91	.179	3.77	76	3.44	70	4.40	2.3
16	Mark Wohlers M. Wohlers	12.53	64.2	1995	ATL	65	7	3	.700	0	2.09	90	0	0	25	51	15	16	2	24	1	49	3	269	4	3.34	3.75	0.28	33.5	8.9	1.16	.322	2.23	49	1.88	44	7.10	17.1
17	Rob Dibble R. Dibble	12.49	98.0	1990	CIN	68	8	3	.727	0	1.74	136	0	0	11	62	19	22	3	34	1	29	3	384	3	3.12	4.00	0.28	35.4	8.9	0.98	.281	2.02	45	1.49	38	5.69	26
18	Randy Johnson R. Johnson	12.47	61.1	1996	SEA	14	5	0	1.000	8	3.67	85	0	0	1	48	25	27	8	25	2	2	0	256	3	3.67	3.40	1.17	33.2	9.8	1.19	.294	3.96	74	3.41	69	7.04	10.5
19	Troy Percival T. Percival	12.46	52.0	1997	ANA	55	5	5	.500	0	3.46	72	0	0	27	40	20	20	6	22	4	46	2	224	5	3.81	3.27	1.04	32.1	9.8	1.19	.283	3.46	77	3.33	73	6.92	7.1
20	Norm Charlton N. Charlton	12.46	34.2	1993	SEA	34	1	3	.250	0	2.34	48	0	0	18	22	9	12	4	17	0	29	0	141	6	4.41	2.82	1.04	34.0	12.1	1.13	.250	3.12	54	3.18	74	5.71	4.4
21	J.R. Richard	12.43	21.0	1971	HOU	4	2	1	.667	4	3.43	29	1	0	0	17	8	9	1	16	0	0	0	96	2	6.86	1.81	0.43	30.2	16.7	1.57	.320	3.86	101	2.59	78	7.29	1.7
22	Randy Johnson R. Johnson	12.35	214.1	1995	SEA	30	18	2	.900	30	2.48	294	6	3	0	159	59	65	12	65	6	0	1	866	5	2.73	4.52	0.50	33.9	7.5	1.05	.301	2.73	53	2.08	44	6.68	62
23	Jeff Brantley J. Brantley	12.34	11.2	1997	CIN	13	1	1	.500	0	3.86	16	0	0	1	9	5	5	2	7	2	9	1	53	2	5.40	2.29	1.54	30.2	13.2	1.37	.269	3.86	92	4.90	115	6.94	-0.8
24	Paul Shuey P. Shuey	12.34	11.2	1994	CLE	14	0	1	.000	0	8.49	16	0	0	5	14	11	11	1	12	0	11	1	62	4	9.26	1.33	0.77	25.8	19.4	2.23	.394	8.49	175	4.58	98	10.80	0.1
25	Ryne Duren R. Duren	12.31	49.0	1960	NYY	42	3	4	.429	1	4.96	67	0	0	8	27	27	29	3	49	7	17	1	229	4	9.00	1.37	0.55	29.3	21.4	1.55	.233	5.33	135	4.02	106	4.96	-1.4