Mike Sullivan has the lowest career K/BB when pitching over 1000 innings, with 0.50 K/BB.

Interpreted as:

worst career k/bb by a player with over 1000 ip

	NAME	K/BB	IP	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	H	ER	R	HR	BB	HBP	GF	TBF	WP	K/9	BB/9	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Mike Sullivan M. Sullivan	0.50	1111.1	160	54	65	.454	119	5.04	285	99	1	4	1,292	622	892	45	568	77	39	5,187	78	2.31	4.60	0.36	5.5	11.0	1.67	.296	7.22	116	4.95	114	10.46	-75.5
2	Jack Dunn J. Dunn	0.51	1076.2	142	64	59	.520	118	4.11	171	103	3	3	1,217	492	664	30	334	54	21	4,687	15	1.43	2.79	0.25	3.6	7.1	1.44	.290	5.55	109	4.07	108	10.17	-35.4
3	George Hemming G. Hemming	0.52	1587.2	204	91	82	.526	168	4.53	362	156	7	6	1,795	800	1,120	55	690	52	34	7,184	40	2.05	3.91	0.31	5.0	9.6	1.57	.289	6.35	105	4.69	106	10.18	-52.4
4	Carl Scheib C. Scheib	0.59	1070.2	267	45	65	.409	107	4.88	290	47	6	18	1,130	581	634	99	493	30	125	4,714	35	2.44	4.14	0.83	6.2	10.5	1.52	.271	5.33	120	4.65	115	9.50	-70.1
5	Bill Carrick B. Carrick	0.60	1324.2	167	63	89	.414	155	4.14	239	138	4	0	1,650	610	889	33	400	65	12	5,896	29	1.62	2.72	0.22	4.1	6.8	1.55	.313	6.04	113	3.86	106	11.21	-32.3
6	Kid Carsey K. Carsey	0.61	2233.1	296	116	138	.457	257	4.95	486	218	4	3	2,794	1,229	1,728	80	800	125	38	10,251	92	1.96	3.22	0.32	4.7	7.8	1.61	.310	6.96	118	4.36	103	11.26	-39.1
7	Bill Hart B. Hart	0.61	1582.0	206	66	120	.355	190	4.65	431	162	5	3	1,819	817	1,214	43	704	71	16	7,243	80	2.45	4.01	0.24	6.0	9.7	1.59	.297	6.91	115	4.43	110	10.35	-71.1
8	Buck Ross B. Ross	0.63	1365.1	237	56	95	.371	182	4.94	360	65	6	2	1,545	749	882	114	573	7	33	6,141	38	2.37	3.78	0.75	5.9	9.3	1.55	.281	5.81	116	4.66	111	10.18	-70.6
9	Ownie Carroll O. Carroll	0.64	1330.2	248	64	90	.416	153	4.43	311	71	2	5	1,532	655	808	61	486	48	60	5,900	42	2.10	3.29	0.41	5.3	8.2	1.52	.295	5.46	112	4.36	108	10.36	-51.4
10	Hugh Mulcahy H. Mulcahy	0.64	1161.2	220	45	89	.336	145	4.49	314	63	5	8	1,271	579	695	69	487	39	47	5,161	36	2.43	3.77	0.53	6.1	9.4	1.51	.283	5.38	113	4.50	110	9.85	-47.8
11	Vern Kennedy V. Kennedy	0.66	2025.2	344	104	132	.441	263	4.67	691	127	7	6	2,173	1,052	1,202	130	1,049	24	56	9,055	54	3.07	4.66	0.58	7.6	11.6	1.59	.285	5.34	107	4.60	108	9.65	-72.9
12	Dick Fowler D. Fowler	0.66	1303.0	221	66	79	.455	170	4.11	382	75	11	4	1,367	595	685	98	578	19	36	5,680	12	2.64	3.99	0.68	6.7	10.2	1.49	.276	4.73	104	4.27	109	9.44	-52.4
13	Brickyard Kennedy B. Kennedy	0.66	3030.0	406	187	159	.540	354	3.96	799	294	13	9	3,282	1,332	1,863	94	1,203	68	49	13,285	87	2.37	3.57	0.28	6.0	9.1	1.48	.287	5.53	98	4.28	106	9.75	-104.3
14	Al Maul A. Maul	0.67	1431.2	187	84	80	.512	167	4.43	346	143	4	1	1,659	705	1,073	59	518	67	20	6,485	52	2.18	3.26	0.37	5.3	8.0	1.52	.291	6.75	104	4.45	103	10.43	-29.6
15	Dixie Davis D. Davis	0.67	1318.2	239	75	71	.514	164	3.97	460	77	10	1	1,311	581	722	62	688	45	46	5,799	22	3.14	4.70	0.42	7.9	11.9	1.52	.275	4.93	94	4.53	109	8.95	-46.7
16	Ellsworth Cunningham E. Cunningham	0.67	2734.2	342	142	167	.460	311	4.22	718	287	4	2	3,071	1,283	1,942	62	1,064	148	28	12,285	161	2.36	3.50	0.20	5.8	8.7	1.51	.292	6.39	111	4.04	107	10.11	-91.1
17	Duke Esper D. Esper	0.68	1727.2	236	101	100	.502	198	4.39	453	152	4	5	2,048	842	1,196	46	669	32	35	7,824	24	2.36	3.49	0.24	5.8	8.6	1.57	.302	6.23	105	4.14	98	10.67	19.9
18	Elam Vangilder E. Vangilder	0.68	1715.2	367	99	102	.493	187	4.28	474	91	13	20	1,894	815	1,014	93	700	42	120	7,568	22	2.49	3.67	0.49	6.3	9.2	1.51	.288	5.32	100	4.43	104	9.94	-26.7
19	Benny Frey B. Frey	0.68	1160.0	256	57	82	.410	127	4.50	179	49	7	7	1,415	580	668	54	263	12	88	5,046	18	1.39	2.04	0.42	3.5	5.2	1.45	.300	5.18	113	4.17	102	10.98	-15
20	Monte Weaver M. Weaver	0.68	1052.0	201	71	50	.587	135	4.36	297	57	2	4	1,137	510	591	62	435	5	38	4,632	17	2.54	3.72	0.53	6.4	9.4	1.49	.280	5.06	99	4.48	104	9.73	-25.3
21	Bill Hoffer B. Hoffer	0.69	1254.1	161	92	46	.667	142	3.75	314	125	10	3	1,333	523	712	22	453	60	18	5,453	22	2.25	3.25	0.16	5.8	8.3	1.42	.285	5.11	90	4.22	99	9.56	3.3
22	Phil Marchildon P. Marchildon	0.70	1214.1	185	68	75	.476	162	3.93	481	82	6	2	1,084	530	605	81	684	23	18	5,309	45	3.56	5.07	0.60	9.1	12.9	1.46	.248	4.48	102	4.34	114	8.03	-72.7
23	Win Mercer W. Mercer	0.70	2484.2	335	132	164	.446	300	3.98	532	253	11	10	3,081	1,098	1,753	64	755	144	34	11,106	43	1.93	2.73	0.23	4.8	6.8	1.54	.314	6.35	96	4.18	99	11.16	13.6
24	Bill James B. James	0.71	1178.2	203	64	71	.474	146	3.21	408	68	9	4	1,110	420	559	16	578	48	28	4,951	31	3.12	4.41	0.12	8.2	11.7	1.43	.280	4.27	112	3.47	120	8.48	-76.3
25	Jim Bagby J. Bagby	0.71	1666.1	303	97	96	.503	198	3.96	431	83	13	9	1,815	733	849	98	608	28	65	7,266	26	2.33	3.28	0.53	5.9	8.4	1.45	.281	4.59	103	3.99	106	9.80	-42.4