highest k/9 as a pitcher between 1951 to 1975 with at least 100 innings

Between the 1951 and 1975 seasons, Dick Radatz had the best K/9 when pitching at least 100 innings, with 9.67 per nine innings.

	NAME	K/9	IP	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	Dick Radatz D. Radatz	9.67	693.2	381	52	43	.547	0	3.13	745	0	0	120	532	241	260	65	296	30	297	46	2,906	25	3.84	2.52	0.84	25.6	10.2	1.19	.264	3.37	84	3.03	80	6.90	64.2
2	Ryne Duren R. Duren	9.62	589.1	311	27	44	.380	32	3.83	630	2	1	55	443	251	284	40	392	41	144	15	2,601	38	5.99	1.61	0.61	24.2	15.1	1.42	.269	4.34	102	3.48	92	6.77	18.6
3	Nolan Ryan N. Ryan	9.59	1650.2	255	105	98	.517	221	3.06	1,758	95	23	3	1,146	562	640	97	997	57	13	23	6,991	77	5.44	1.76	0.53	25.1	14.3	1.30	.257	3.49	90	3.06	90	6.25	62.3
4	Sandy Koufax S. Koufax	9.28	2324.1	397	165	87	.655	314	2.76	2,396	137	40	9	1,754	713	806	204	817	18	44	48	9,497	87	3.16	2.93	0.79	25.2	8.6	1.11	.256	3.12	75	2.69	75	6.79	226.6
5	Sam McDowell S. McDowell	8.86	2492.1	425	141	134	.513	346	3.17	2,453	103	23	14	1,948	879	999	164	1,312	59	39	74	10,587	140	4.74	1.87	0.59	23.2	12.4	1.31	.270	3.61	90	3.06	84	7.03	160.4
6	Herb Score H. Score	8.78	858.1	150	55	46	.545	127	3.36	837	47	11	3	609	320	364	79	573	7	11	7	3,696	55	6.01	1.46	0.83	22.6	15.5	1.38	.241	3.82	86	3.71	95	6.39	18.4
7	Balor Moore B. Moore	8.65	347.1	71	16	29	.356	58	4.12	334	9	4	0	300	159	176	34	191	8	5	7	1,503	17	4.95	1.75	0.88	22.2	12.7	1.41	.284	4.56	111	3.56	97	7.77	3.5
8	Tom Hall T. Hall	8.44	810.0	316	50	31	.617	63	3.21	760	7	3	31	619	289	335	82	353	8	111	29	3,362	22	3.92	2.15	0.91	22.6	10.5	1.20	.249	3.72	91	3.29	91	6.88	30.1
9	Ed Connolly E. Connolly	8.17	130.0	42	6	12	.333	19	5.88	118	1	1	0	143	85	96	9	98	7	9	4	627	16	6.78	1.20	0.62	18.8	15.6	1.85	.339	6.65	168	4.09	111	9.90	-4.9
10	Al Hrabosky A. Hrabosky	8.14	269.2	196	26	9	.743	1	2.34	244	0	0	36	214	70	86	10	102	4	98	22	1,115	13	3.40	2.39	0.33	21.9	9.1	1.17	.270	2.87	63	2.42	68	7.14	34.4
11	J.R. Richard	8.10	366.2	72	23	16	.590	55	4.37	330	10	2	0	317	178	193	14	236	8	3	0	1,612	36	5.79	1.40	0.34	20.5	14.6	1.51	.296	4.74	127	3.25	94	7.78	8
12	Karl Spooner K. Spooner	8.10	116.2	31	10	6	.625	16	3.09	105	4	3	2	86	40	50	8	47	5	10	1	488	1	3.63	2.23	0.62	21.5	9.6	1.14	.241	3.86	73	2.80	66	6.63	18.3
13	Billy McCool B. McCool	8.02	528.1	292	32	42	.432	20	3.59	471	0	0	58	465	211	239	31	272	19	163	38	2,296	37	4.63	1.73	0.53	20.5	11.8	1.39	.289	4.07	99	3.17	91	7.92	20.6
14	Bob Veale B. Veale	7.96	1926.0	397	120	95	.558	255	3.07	1,703	78	20	21	1,684	658	755	91	858	29	63	62	8,163	92	4.01	1.98	0.43	20.9	10.5	1.32	.291	3.53	87	2.76	82	7.87	130
15	John Montefusco J. Montefusco	7.92	283.0	42	18	11	.621	39	3.15	249	11	5	0	251	99	107	14	105	8	2	12	1,197	6	3.34	2.37	0.45	20.8	8.8	1.26	.289	3.40	84	2.66	75	7.98	27.5
16	Marshall Bridges M. Bridges	7.87	345.1	206	23	15	.605	5	3.75	302	1	0	25	315	144	171	29	191	3	103	23	1,523	11	4.98	1.58	0.76	19.8	12.5	1.47	.287	4.46	97	3.58	93	8.21	10
17	Jim Maloney J. Maloney	7.81	1849.0	302	134	84	.615	262	3.19	1,605	74	30	4	1,518	655	729	138	810	36	18	39	7,745	124	3.94	1.98	0.67	20.7	10.5	1.26	.268	3.55	87	3.13	88	7.39	84.2
18	Gary Kroll G. Kroll	7.79	159.1	71	6	7	.462	13	4.24	138	1	0	1	147	75	84	18	91	7	25	0	719	6	5.14	1.52	1.02	19.2	12.7	1.49	.277	4.74	120	4.12	119	8.30	-11.8
19	Pete Cimino P. Cimino	7.77	161.0	86	5	8	.385	1	3.07	139	0	0	5	133	55	70	16	65	3	36	7	674	8	3.63	2.14	0.89	20.6	9.6	1.23	.259	3.91	94	3.37	100	7.43	0.1
20	Tom Seaver T. Seaver	7.72	2447.2	319	168	96	.636	314	2.46	2,099	148	34	1	1,940	669	733	173	656	44	5	53	9,760	56	2.41	3.20	0.64	21.5	6.7	1.06	.260	2.70	71	2.57	76	7.13	221.9
21	Frank Tanana F. Tanana	7.67	552.1	77	32	30	.516	72	2.88	471	30	10	0	493	177	195	50	158	15	3	10	2,264	14	2.57	2.98	0.81	20.8	7.0	1.18	.282	3.18	83	2.98	83	8.03	38.2
22	John Hiller J. Hiller	7.54	794.2	339	53	43	.552	34	2.55	666	9	5	81	642	225	253	65	303	9	212	42	3,282	19	3.43	2.20	0.74	20.3	9.2	1.19	.258	2.87	71	3.09	84	7.27	52.5
23	Sam Jones S. Jones	7.54	1643.1	322	102	101	.502	222	3.59	1,376	76	17	10	1,403	655	752	151	822	60	45	37	7,074	45	4.50	1.67	0.83	19.5	11.6	1.35	.268	4.12	92	3.61	93	7.68	49.1
24	Terry Forster T. Forster	7.46	493.2	234	24	30	.444	17	3.14	409	4	0	74	445	172	192	18	217	12	150	19	2,098	23	3.96	1.88	0.33	19.5	10.3	1.34	.296	3.50	85	2.73	74	8.11	50.4
25	Dave Boswell D. Boswell	7.45	1065.1	205	68	56	.548	151	3.52	882	37	6	0	858	417	462	110	481	34	13	16	4,487	44	4.06	1.83	0.93	19.7	10.7	1.26	.251	3.90	101	3.64	101	7.25	-0.7