who has the highest career strikeouts per 9 innings with a minimum of 4,000 ip

Randy Johnson has the best career K/9 when pitching at least 4000 innings, with 10.61 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	Randy Johnson R. Johnson	10.61	4135.1	618	303	166	.646	603	3.29	4,875	100	37	2	3,346	1,513	1,703	411	1,497	190	7	37	17,067	109	3.26	3.26	0.89	28.6	8.8	1.17	.291	3.71	75	3.18	73	7.28	554.3
2	Nolan Ryan N. Ryan	9.55	5386.0	807	324	292	.526	773	3.19	5,714	222	61	3	3,923	1,911	2,178	321	2,795	158	13	78	22,575	277	4.67	2.04	0.54	25.3	12.4	1.25	.265	3.64	90	2.96	83	6.56	370.2
3	Roger Clemens R. Clemens	8.55	4916.2	709	354	184	.658	707	3.12	4,672	118	46	0	4,185	1,707	1,885	363	1,580	159	0	63	20,240	143	2.89	2.96	0.66	23.1	7.8	1.17	.284	3.45	70	3.08	71	7.66	680.4
4	Steve Carlton S. Carlton	7.13	5217.2	741	329	244	.574	709	3.22	4,136	254	55	2	4,672	1,864	2,130	414	1,833	53	13	150	21,683	183	3.16	2.26	0.71	19.1	8.5	1.25	.279	3.67	87	3.14	86	8.06	271.5
5	Tom Seaver T. Seaver	6.85	4783.0	656	311	205	.603	647	2.86	3,640	231	61	1	3,971	1,521	1,674	380	1,390	76	6	116	19,369	126	2.62	2.62	0.72	18.8	7.2	1.12	.259	3.15	79	3.03	85	7.47	286.1
6	Bert Blyleven B. Blyleven	6.70	4970.0	692	287	250	.534	685	3.31	3,701	242	60	0	4,632	1,830	2,029	430	1,322	155	3	71	20,491	114	2.39	2.80	0.78	18.1	6.5	1.20	.282	3.67	85	3.18	82	8.39	368.6
7	Fergie Jenkins F. Jenkins	6.38	4500.2	664	284	226	.557	594	3.34	3,192	267	49	7	4,142	1,669	1,853	484	997	84	37	116	18,400	62	1.99	3.20	0.97	17.3	5.4	1.14	.268	3.71	87	3.27	88	8.28	222.9
8	Don Sutton D. Sutton	6.09	5282.1	774	324	256	.559	756	3.26	3,574	178	58	5	4,692	1,914	2,104	472	1,343	82	12	102	21,631	112	2.29	2.66	0.80	16.5	6.2	1.14	.261	3.58	92	3.23	90	7.99	181.2
9	Greg Maddux G. Maddux	6.06	5008.1	744	355	227	.610	740	3.16	3,371	109	35	0	4,726	1,756	1,981	353	999	137	3	177	20,421	70	1.80	3.37	0.63	16.5	4.9	1.14	.281	3.56	76	3.25	78	8.49	519.5
10	Frank Tanana F. Tanana	5.96	4188.1	638	240	236	.504	616	3.66	2,773	143	34	1	4,063	1,704	1,910	448	1,255	129	10	116	17,641	119	2.70	2.21	0.96	15.7	7.1	1.27	.277	4.10	94	3.78	96	8.73	66.4
11	Gaylord Perry G. Perry	5.95	5350.0	777	314	265	.542	690	3.11	3,534	303	53	10	4,938	1,846	2,128	399	1,379	108	33	164	21,953	160	2.32	2.56	0.67	16.1	6.3	1.18	.275	3.58	85	3.06	85	8.31	312.9
12	Phil Niekro P. Niekro	5.57	5404.0	864	318	274	.537	716	3.35	3,342	245	45	29	5,044	2,012	2,337	482	1,809	123	83	86	22,677	226	3.01	1.85	0.80	14.7	8.0	1.27	.270	3.89	87	3.61	95	8.40	116.1
13	Jamie Moyer J. Moyer	5.39	4074.0	696	269	209	.563	638	4.25	2,441	33	10	0	4,231	1,926	2,076	522	1,155	146	15	69	17,356	57	2.55	2.11	1.15	14.1	6.7	1.32	.283	4.59	97	4.46	102	9.35	-33.5
14	Walter Johnson W. Johnson	5.34	5914.1	802	417	279	.599	666	2.17	3,509	531	110	34	4,913	1,424	1,902	97	1,363	205	127		23,405	154	2.07	2.57	0.15	15.0	5.8	1.06	.264	2.89	68	2.42	76	7.48	472.8
15	Tom Glavine T. Glavine	5.32	4413.1	682	305	203	.600	682	3.54	2,607	56	25	0	4,298	1,734	1,900	356	1,500	66	0	145	18,604	65	3.06	1.74	0.73	14.0	8.1	1.31	.280	3.87	86	3.94	94	8.76	120.1
16	Jim Kaat J. Kaat	4.89	4530.1	898	283	237	.544	625	3.45	2,461	180	31	17	4,620	1,738	2,038	395	1,083	122	102	116	19,023	128	2.15	2.27	0.78	12.9	5.7	1.26	.282	4.05	93	3.41	91	9.18	165.8
17	Christy Mathewson C. Mathewson	4.71	4788.2	636	373	188	.665	552	2.13	2,507	435	79	30	4,219	1,135	1,620	89	848	59	73		18,913	115	1.59	2.96	0.17	13.3	4.5	1.06	.268	3.04	75	2.26	76	7.93	363
18	Early Wynn E. Wynn	4.60	4564.0	691	300	244	.551	611	3.54	2,334	289	49	16	4,291	1,796	2,037	338	1,775	64	67	36	19,408	51	3.50	1.31	0.67	12.0	9.1	1.33	.265	4.02	94	3.64	97	8.46	56.4
19	Tim Keefe T. Keefe	4.57	5049.2	600	342	225	.603	594	2.63	2,564	554	39	2	4,438	1,474	2,470	75	1,233	83	7		20,941	240	2.20	2.08	0.13	12.2	5.9	1.12	.257	4.40	79	2.92	87	7.91	239.2
20	Robin Roberts R. Roberts	4.52	4688.2	676	286	245	.539	609	3.41	2,357	305	45	25	4,582	1,774	1,962	505	902	54	49	69	19,174	33	1.73	2.61	0.97	12.3	4.7	1.17	.265	3.77	89	3.50	91	8.80	179.6
21	Eddie Plank E. Plank	4.50	4495.2	623	326	194	.627	529	2.35	2,246	410	69	23	3,958	1,174	1,566	42	1,072	190	77		17,803	88	2.15	2.10	0.08	12.6	6.0	1.12	.275	3.14	81	2.45	86	7.92	195.2
22	Warren Spahn W. Spahn	4.43	5243.2	750	363	245	.597	665	3.09	2,583	382	63	28	4,830	1,798	2,016	434	1,434	42	67	60	21,547	81	2.46	1.80	0.74	12.0	6.7	1.19	.258	3.46	84	3.44	94	8.29	124.4
23	Tommy John T. John	4.29	4710.1	760	288	231	.555	700	3.34	2,245	162	46	3	4,783	1,749	2,017	302	1,259	98	22	102	19,692	187	2.41	1.78	0.58	11.4	6.4	1.28	.284	3.85	90	3.37	89	9.14	208.3
24	Red Ruffing R. Ruffing	4.12	4344.0	624	273	225	.548	538	3.80	1,987	335	45	18	4,284	1,833	2,115	254	1,541	58	69		18,546	46	3.19	1.29	0.53	10.7	8.3	1.34	.274	4.38	91	3.93	95	8.88	82.3
25	John Clarkson J. Clarkson	3.92	4536.1	531	328	178	.648	518	2.81	1,978	485	37	5	4,295	1,417	2,384	159	1,191	80	12		19,146	182	2.36	1.66	0.32	10.3	6.2	1.21	.263	4.73	75	3.35	88	8.52	289.8