what is the highest strikeout to walk ratio by a pitcher ever

Nolan Ryan has struck out the most career hitters with >0 walks allowed, with 5,714 strikeouts.

	NAME	SO	BB	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	Nolan Ryan N. Ryan	5,714	2,795	807	324	292	.526	773	3.19	222	61	3	5386.0	3,923	1,911	2,178	321	158	13	78	22,575	277	9.55	4.67	2.04	0.54	25.3	12.4	1.25	.265	3.64	90	2.96	83	6.56	370.2
2	Randy Johnson R. Johnson	4,875	1,497	618	303	166	.646	603	3.29	100	37	2	4135.1	3,346	1,513	1,703	411	190	7	37	17,067	109	10.61	3.26	3.26	0.89	28.6	8.8	1.17	.291	3.71	75	3.18	73	7.28	554.3
3	Roger Clemens R. Clemens	4,672	1,580	709	354	184	.658	707	3.12	118	46	0	4916.2	4,185	1,707	1,885	363	159	0	63	20,240	143	8.55	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	4,136	1,833	741	329	244	.574	709	3.22	254	55	2	5217.2	4,672	1,864	2,130	414	53	13	150	21,683	183	7.13	3.16	2.26	0.71	19.1	8.5	1.25	.279	3.67	87	3.14	86	8.06	271.5
5	Bert Blyleven B. Blyleven	3,701	1,322	692	287	250	.534	685	3.31	242	60	0	4970.0	4,632	1,830	2,029	430	155	3	71	20,491	114	6.70	2.39	2.80	0.78	18.1	6.5	1.20	.282	3.67	85	3.18	82	8.39	368.6
6	Tom Seaver T. Seaver	3,640	1,390	656	311	205	.603	647	2.86	231	61	1	4783.0	3,971	1,521	1,674	380	76	6	116	19,369	126	6.85	2.62	2.62	0.72	18.8	7.2	1.12	.259	3.15	79	3.03	85	7.47	286.1
7	Don Sutton D. Sutton	3,574	1,343	774	324	256	.559	756	3.26	178	58	5	5282.1	4,692	1,914	2,104	472	82	12	102	21,631	112	6.09	2.29	2.66	0.80	16.5	6.2	1.14	.261	3.58	92	3.23	90	7.99	181.2
8	Gaylord Perry G. Perry	3,534	1,379	777	314	265	.542	690	3.11	303	53	10	5350.0	4,938	1,846	2,128	399	108	33	164	21,953	160	5.95	2.32	2.56	0.67	16.1	6.3	1.18	.275	3.58	85	3.06	85	8.31	312.9
9	Walter Johnson W. Johnson	3,509	1,363	802	417	279	.599	666	2.17	531	110	34	5914.1	4,913	1,424	1,902	97	205	127		23,405	154	5.34	2.07	2.57	0.15	15.0	5.8	1.06	.264	2.89	68	2.42	76	7.48	472.8
10	Justin Verlander J. Verlander	3,451	967	534	262	149	.637	534	3.31	26	9	0	3457.2	2,931	1,273	1,377	361	116	0	27	14,123	97	8.98	2.52	3.57	0.94	24.4	6.8	1.13	.279	3.58	78	3.43	81	7.63	306
11	Max Scherzer M. Scherzer	3,408	756	467	215	112	.657	458	3.16	12	5	0	2881.0	2,349	1,012	1,085	337	112	2	20	11,640	78	10.65	2.36	4.51	1.05	29.3	6.5	1.08	.286	3.39	76	3.18	77	7.34	307.8
12	Greg Maddux G. Maddux	3,371	999	744	355	227	.610	740	3.16	109	35	0	5008.1	4,726	1,756	1,981	353	137	3	177	20,421	70	6.06	1.80	3.37	0.63	16.5	4.9	1.14	.281	3.56	76	3.25	78	8.49	519.5
13	Phil Niekro P. Niekro	3,342	1,809	864	318	274	.537	716	3.35	245	45	29	5404.0	5,044	2,012	2,337	482	123	83	86	22,677	226	5.57	3.01	1.85	0.80	14.7	8.0	1.27	.270	3.89	87	3.61	95	8.40	116.1
14	Fergie Jenkins F. Jenkins	3,192	997	664	284	226	.557	594	3.34	267	49	7	4500.2	4,142	1,669	1,853	484	84	37	116	18,400	62	6.38	1.99	3.20	0.97	17.3	5.4	1.14	.268	3.71	87	3.27	88	8.28	222.9
15	Pedro Martinez P. Martinez	3,154	760	476	219	100	.687	409	2.93	46	17	3	2827.1	2,221	919	1,006	239	141	23	30	11,394	62	10.04	2.42	4.15	0.76	27.7	6.7	1.05	.279	3.20	66	2.91	68	7.07	454.6
16	Bob Gibson B. Gibson	3,117	1,336	528	251	174	.591	482	2.91	255	56	6	3884.1	3,279	1,258	1,420	257	102	21	118	16,068	108	7.22	3.10	2.33	0.60	19.4	8.3	1.19	.268	3.29	78	2.89	81	7.60	290.5
17	Curt Schilling C. Schilling	3,116	711	569	216	146	.597	436	3.46	83	20	22	3261.0	2,998	1,253	1,318	347	52	81	43	13,284	72	8.60	1.96	4.38	0.96	23.5	5.4	1.14	.293	3.64	80	3.22	76	8.27	373.6
18	CC Sabathia	3,093	1,099	561	251	161	.609	560	3.74	38	12	0	3577.1	3,404	1,485	1,623	382	123	0	44	14,989	74	7.78	2.76	2.81	0.96	20.6	7.3	1.26	.294	4.08	87	3.77	87	8.56	223.7
19	John Smoltz J. Smoltz	3,084	1,010	723	213	155	.579	481	3.33	53	16	154	3473.0	3,074	1,284	1,391	288	57	204	84	14,271	145	7.99	2.62	3.05	0.75	21.6	7.1	1.18	.283	3.60	81	3.23	78	7.97	356.6
20	Zack Greinke Z. Greinke	2,979	762	586	225	156	.591	541	3.49	17	5	1	3389.1	3,207	1,315	1,410	367	79	8	25	13,877	101	7.91	2.02	3.91	0.97	21.5	5.5	1.17	.293	3.74	83	3.51	85	8.52	235
21	Clayton Kershaw C. Kershaw	2,968	678	432	212	94	.693	429	2.50	25	15	0	2742.2	2,091	762	835	227	44	1	28	10,816	103	9.74	2.22	4.38	0.74	27.4	6.3	1.01	.270	2.74	64	2.82	70	6.86	366.8
22	Jim Bunning J. Bunning	2,855	1,000	591	224	184	.549	519	3.27	151	40	16	3760.1	3,433	1,366	1,527	372	160	39	98	15,618	47	6.83	2.39	2.86	0.89	18.3	6.4	1.18	.273	3.65	88	3.22	88	8.22	195.2
23	Mickey Lolich M. Lolich	2,832	1,099	586	217	191	.532	496	3.44	195	41	10	3638.1	3,366	1,390	1,537	347	92	40	67	15,140	124	7.01	2.72	2.58	0.86	18.7	7.3	1.23	.280	3.80	96	3.19	87	8.33	188.5
24	Mike Mussina M. Mussina	2,813	785	537	270	153	.638	536	3.68	57	23	0	3562.2	3,460	1,458	1,559	376	60	0	29	14,593	71	7.11	1.98	3.58	0.95	19.3	5.4	1.19	.292	3.94	82	3.57	79	8.74	372.8
25	Cy Young C. Young	2,803	1,217	906	511	316	.618	815	2.63	749	76	17	7356.0	7,092	2,147	3,167	138	161	84		29,565	156	3.43	1.49	2.30	0.17	9.5	4.1	1.13	.275	3.87	74	2.84	79	8.68	620