Between the 1990 and 1999 seasons, Shane Reynolds had the best K/BB, with 4.25 K/BB.

Interpreted as:

MLB pitcher best so/walk with a minimum of 0.5 IP per team game in 1990s

	NAME	K/BB	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	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	Shane Reynolds S. Reynolds	4.25	211	79	61	.564	185	3.70	1,067	17	7	0	1234.2	1,300	508	561	114	251	22	5	21	5,183	30	7.78	1.83	0.83	20.6	4.8	1.26	.318	4.09	93	3.25	80	9.48	116.6
2	Greg Maddux G. Maddux	3.98	331	176	88	.667	331	2.54	1,764	75	23	0	2394.2	2,084	677	786	111	443	60	0	74	9,563	32	6.63	1.66	0.42	18.4	4.6	1.06	.275	2.95	62	2.77	67	7.83	361.6
3	Bret Saberhagen B. Saberhagen	3.92	192	74	54	.578	190	3.43	835	24	4	0	1218.2	1,193	465	503	110	213	41	0	15	4,982	21	6.17	1.57	0.81	16.8	4.3	1.15	.286	3.71	81	3.42	83	8.81	96.6
4	Jose Lima J. Lima	3.87	177	46	40	.535	89	4.37	522	6	1	5	707.2	747	344	363	98	135	23	31	14	2,978	23	6.64	1.72	1.25	17.5	4.5	1.25	.295	4.62	102	4.12	95	9.50	15.9
5	Steve Woodard S. Woodard	3.81	72	24	23	.511	62	4.44	286	2	0	0	387.1	428	191	209	47	75	17	2	11	1,646	7	6.65	1.74	1.09	17.4	4.6	1.30	.312	4.86	100	3.94	88	9.94	23
6	Pedro Martinez P. Martinez	3.74	249	107	50	.682	182	2.83	1,534	28	11	3	1359.1	1,050	428	476	107	410	55	23	20	5,477	38	10.16	2.71	0.71	28.0	7.5	1.07	.280	3.15	65	2.90	68	6.95	213
7	Doug Jones D. Jones	3.66	618	48	58	.453	4	3.47	618	0	0	223	779.0	800	300	327	70	169	27	483	36	3,273	14	7.14	1.95	0.81	18.9	5.2	1.24	.306	3.78	82	3.34	80	9.24	74.2
8	Keith Foulke K. Foulke	3.66	148	10	10	.500	8	3.98	234	0	0	13	244.0	211	108	111	33	64	11	54	9	1,004	5	8.63	2.36	1.22	23.3	6.4	1.13	.269	4.09	91	3.88	86	7.78	19.2
9	Curt Schilling C. Schilling	3.54	317	99	79	.556	210	3.31	1,561	57	13	13	1668.1	1,451	613	663	148	441	30	60	33	6,802	46	8.42	2.38	0.80	22.9	6.5	1.13	.282	3.58	80	3.16	77	7.83	175.5
10	Jon Lieber J. Lieber	3.40	182	48	58	.453	135	4.30	694	7	1	2	886.0	976	423	490	112	204	13	10	23	3,792	10	7.05	2.07	1.14	18.3	5.4	1.33	.312	4.98	99	3.94	91	9.91	41
11	Gil Heredia G. Heredia	3.16	211	35	32	.522	78	4.38	398	2	0	4	645.2	721	314	342	64	126	22	43	15	2,740	11	5.55	1.76	0.89	14.5	4.6	1.31	.308	4.77	99	3.82	88	10.05	41.2
12	Bob Tewksbury B. Tewksbury	3.16	256	99	89	.527	243	3.88	723	28	6	1	1592.0	1,789	687	768	125	229	33	2	16	6,680	20	4.09	1.29	0.71	10.8	3.4	1.27	.299	4.34	94	3.60	88	10.11	86.8
13	Mike Mussina M. Mussina	3.15	254	136	66	.673	254	3.50	1,325	39	14	0	1772.0	1,659	689	731	182	421	19	0	15	7,214	36	6.73	2.14	0.92	18.4	5.8	1.17	.280	3.71	77	3.63	80	8.43	180
14	Rick Reed R. Reed	3.13	134	47	36	.566	121	3.79	475	7	4	1	769.2	779	324	352	98	152	21	3	17	3,165	2	5.55	1.78	1.15	15.0	4.8	1.21	.282	4.12	92	4.14	99	9.11	0.9
15	Duane Ward D. Ward	3.10	308	18	22	.450	0	2.83	447	0	0	91	410.2	317	129	141	21	144	6	190	18	1,657	27	9.80	3.16	0.46	27.0	8.7	1.12	.285	3.09	69	2.42	59	6.95	76.3
16	Jose Rijo J. Rijo	3.05	168	72	43	.626	168	2.74	955	16	3	0	1111.0	972	338	383	74	313	14	0	10	4,519	10	7.74	2.54	0.60	21.1	6.9	1.16	.284	3.10	70	2.94	73	7.87	129.7
17	Kevin Millwood K. Millwood	3.01	76	40	18	.690	70	3.37	410	5	1	0	453.2	398	170	192	43	136	9	3	6	1,881	12	8.13	2.70	0.85	21.8	7.2	1.18	.277	3.81	78	3.51	80	7.90	45.6
18	Greg Swindell G. Swindell	3.00	416	80	78	.506	184	3.88	961	18	5	4	1480.1	1,580	638	709	173	320	17	49	21	6,193	18	5.84	1.95	1.05	15.5	5.2	1.28	.298	4.31	96	3.86	95	9.61	26.3
19	Jeff Zimmerman J. Zimmerman	2.91	65	9	3	.750	0	2.36	67	0	0	3	87.2	50	23	24	9	23	2	14	1	336	2	6.88	2.36	0.92	19.9	6.8	0.83	.174	2.46	47	3.78	77	5.13	10.6
20	Roger Clemens R. Clemens	2.87	305	152	89	.631	305	3.02	2,101	57	24	0	2177.2	1,829	731	813	139	731	82	0	28	8,968	59	8.68	3.02	0.57	23.4	8.2	1.18	.286	3.36	66	3.02	68	7.56	333
21	David Wells D. Wells	2.85	331	127	87	.593	272	4.11	1,244	36	9	6	1897.0	1,908	866	938	233	436	43	25	40	7,884	60	5.90	2.07	1.11	15.8	5.5	1.24	.283	4.45	92	4.07	91	9.05	88.8
22	John Smoltz J. Smoltz	2.83	315	143	95	.601	315	3.32	1,893	42	14	0	2142.1	1,858	791	867	170	669	34	0	49	8,803	109	7.95	2.81	0.71	21.5	7.6	1.18	.280	3.64	81	3.25	79	7.81	206.5
23	Scott Elarton S. Elarton	2.81	70	11	6	.647	17	3.43	177	0	0	3	181.0	151	69	76	13	63	5	15	0	751	4	8.80	3.13	0.65	23.6	8.4	1.18	.280	3.78	82	3.23	76	7.51	21.2
24	Rheal Cormier R. Cormier	2.80	229	40	39	.506	108	4.14	464	7	1	0	778.0	832	358	401	77	166	31	17	13	3,287	27	5.37	1.92	0.89	14.1	5.1	1.28	.296	4.64	103	3.85	95	9.62	18.2
25	Randy Johnson R. Johnson	2.79	298	150	75	.667	290	3.14	2,538	65	25	2	2063.1	1,560	721	805	183	910	98	3	13	8,557	65	11.07	3.97	0.80	29.7	10.6	1.20	.285	3.51	72	3.16	73	6.80	281.4