all-time best so/walk ratio by pitcher career, minimum 1000 ip

Jacob deGrom has the highest career K/BB when pitching at least 1000 innings, with 5.37 K/BB.

	NAME	K/BB	IP	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Jacob deGrom J. deGrom	5.37	1539.2	248	96	65	.596	248	2.57	1,851	4	2	0	1,173	440	477	146	345	25	0	13	6,045	30	10.82	2.02	0.85	30.6	5.7	0.99	.279	2.79	66	2.70	66	6.86	239.4
2	Chris Sale C. Sale	5.30	2084.0	393	145	88	.622	312	3.01	2,579	16	3	12	1,692	697	750	213	487	130	25	15	8,389	48	11.14	2.10	0.92	30.7	5.8	1.05	.297	3.24	70	2.87	68	7.31	303.3
3	Tommy Bond T. Bond	4.83	2779.2	322	193	115	.627	314	2.25	860	294	35	0	2,857	695	1,339	32	178		11		11,386	120	2.78	0.58	0.10	7.6	1.6	1.09	.274	4.34	89	2.38	95	9.25	32.3
4	Josh Tomlin J. Tomlin	4.81	1067.0	286	69	56	.552	150	4.77	736	5	1	2	1,160	566	602	197	153	25	55	16	4,453	28	6.21	1.29	1.66	16.5	3.4	1.23	.288	5.08	114	4.64	112	9.78	-57
5	Masahiro Tanaka M. Tanaka	4.76	1054.1	174	78	46	.629	173	3.74	991	7	4	0	983	438	476	159	208	26	0	1	4,299	32	8.46	1.78	1.36	23.1	4.8	1.13	.283	4.06	88	3.90	89	8.39	53.3
6	Corey Kluber C. Kluber	4.69	1641.2	271	116	77	.601	260	3.44	1,725	18	8	1	1,486	627	684	177	368	65	4	9	6,688	31	9.46	2.02	0.97	25.8	5.5	1.13	.301	3.75	83	3.22	78	8.15	161.7
7	Gerrit Cole G. Cole	4.50	1954.0	317	153	80	.657	317	3.18	2,251	8	5	0	1,627	690	740	217	500	61	0	8	7,861	58	10.37	2.30	1.00	28.6	6.4	1.09	.292	3.41	79	3.16	77	7.49	213.5
8	Max Scherzer M. Scherzer	4.48	2963.0	483	220	117	.653	474	3.22	3,489	12	5	0	2,433	1,059	1,132	354	779	114	2	20	11,987	80	10.60	2.37	1.08	29.1	6.5	1.08	.287	3.44	77	3.23	78	7.39	302.5
9	Curt Schilling C. Schilling	4.38	3261.0	569	216	146	.597	436	3.46	3,116	83	20	22	2,998	1,253	1,318	347	711	52	81	43	13,284	72	8.60	1.96	0.96	23.5	5.4	1.14	.293	3.64	80	3.22	76	8.27	373.6
10	Stephen Strasburg S. Strasburg	4.37	1470.0	247	113	62	.646	247	3.24	1,723	2	2	0	1,217	530	582	149	394	53	0	20	5,962	44	10.55	2.41	0.91	28.9	6.6	1.10	.293	3.56	80	3.01	75	7.45	165.9
11	Michael Pineda M. Pineda	4.37	1008.2	181	64	61	.512	180	4.06	966	1	0	0	990	455	488	144	221	24	0	4	4,189	37	8.62	1.97	1.28	23.1	5.3	1.20	.299	4.35	98	3.80	90	8.83	49
12	Clayton Kershaw C. Kershaw	4.28	2855.1	455	223	96	.699	451	2.53	3,052	25	15	0	2,193	804	881	235	713	46	1	28	11,279	108	9.62	2.25	0.74	27.1	6.3	1.02	.271	2.78	65	2.85	70	6.91	375.1
13	Aaron Nola A. Nola	4.18	1715.2	285	109	89	.551	285	3.83	1,876	6	4	0	1,522	730	769	217	449	56	0	16	7,039	18	9.84	2.36	1.14	26.7	6.4	1.15	.294	4.03	91	3.50	82	7.98	147.1
14	Zach Eflin Z. Eflin	4.17	1073.2	200	68	67	.504	188	4.28	922	5	3	1	1,106	511	550	162	221	32	5	14	4,501	14	7.73	1.85	1.36	20.5	4.9	1.24	.298	4.61	103	4.13	97	9.27	14
15	Pedro Martinez P. Martinez	4.15	2827.1	476	219	100	.687	409	2.93	3,154	46	17	3	2,221	919	1,006	239	760	141	23	30	11,394	62	10.04	2.42	0.76	27.7	6.7	1.05	.279	3.20	66	2.91	68	7.07	454.6
16	Mariano Rivera M. Rivera	4.10	1283.2	1,115	82	60	.577	10	2.21	1,173	0	0	652	998	315	340	71	286	46	952	41	5,103	13	8.22	2.01	0.50	23.0	5.6	1.00	.263	2.38	49	2.76	61	7.00	246.7
17	Dan Haren D. Haren	4.03	2419.2	391	153	131	.539	380	3.75	2,013	16	6	1	2,357	1,009	1,105	305	500	67	4	39	10,022	98	7.49	1.86	1.13	20.1	5.0	1.18	.288	4.11	92	3.77	92	8.77	92.8
18	Joe Musgrove J. Musgrove	4.01	1056.0	206	66	62	.516	180	3.73	1,050	2	2	2	970	438	472	133	262	77	7	10	4,385	21	8.95	2.23	1.13	23.9	6.0	1.17	.292	4.02	91	3.78	90	8.27	49.3
19	Logan Webb L. Webb	3.98	1062.1	180	69	51	.575	177	3.38	994	3	2	0	1,020	399	440	74	250	36	0	4	4,350	22	8.42	2.12	0.63	22.9	5.7	1.20	.316	3.73	83	3.01	75	8.64	121.8
20	Hyun Jin Ryu H. Jin Ryu	3.96	1055.1	186	78	48	.619	185	3.27	934	4	3	1	1,013	384	416	116	236	17	1	13	4,339	15	7.97	2.01	0.99	21.5	5.4	1.18	.295	3.55	82	3.52	86	8.64	64.8
21	Cliff Lee C. Lee	3.93	2156.2	328	143	91	.611	324	3.52	1,824	29	12	0	2,116	843	923	223	464	50	1	12	8,917	41	7.61	1.94	0.93	20.5	5.2	1.20	.298	3.85	84	3.44	82	8.83	168.2
22	Zack Greinke Z. Greinke	3.91	3389.1	586	225	156	.591	541	3.49	2,979	17	5	1	3,207	1,315	1,410	367	762	79	8	25	13,877	101	7.91	2.02	0.97	21.5	5.5	1.17	.293	3.74	83	3.51	85	8.52	235
23	Jim Whitney J. Whitney	3.82	3496.1	413	191	204	.484	396	2.97	1,571	377	26	2	3,598	1,154	2,026	79	411	28	16		14,666	214	4.04	1.06	0.20	10.7	2.8	1.15	.280	5.22	96	2.75	87	9.26	148.2
24	Madison Bumgarner M. Bumgarner	3.81	2209.1	358	134	124	.519	355	3.47	2,070	16	7	0	2,007	853	933	258	544	89	1	38	9,098	29	8.43	2.22	1.05	22.8	6.0	1.15	.285	3.80	90	3.62	94	8.18	50.1
25	Zack Wheeler Z. Wheeler	3.71	1728.1	283	113	75	.601	283	3.28	1,820	5	3	0	1,475	630	683	166	490	76	0	14	7,086	41	9.48	2.55	0.86	25.7	6.9	1.14	.289	3.56	82	3.28	80	7.68	164.6