Since 1980, Steve Comer has the worst K/9 when pitching in 100+ games, with 2.47 per nine innings.

Interpreted as:

lowest k/9 by a player since 1980 min 100 games

	NAME	K/9	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	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	Steve Comer S. Comer	2.47	110	16	20	.444	36	5.08	94	2	0	12	342.0	425	193	216	28	131	9	44	19	1,544	7	3.45	0.72	0.74	6.1	8.5	1.63	.310	5.68	129	4.45	114	11.18	-21.4
2	Mike Caldwell M. Caldwell	2.58	151	59	57	.509	141	4.18	282	40	8	1	982.0	1,097	456	502	123	224	5	1	12	4,128	20	2.05	1.26	1.13	6.8	5.4	1.35	.279	4.60	109	4.47	116	10.05	-71.7
3	Jeff Ballard J. Ballard	2.84	197	41	53	.436	118	4.71	244	10	2	2	773.1	914	405	458	92	229	18	22	22	3,357	13	2.67	1.07	1.07	7.3	6.8	1.48	.296	5.33	119	4.69	117	10.64	-60.7
4	Tommy John T. John	2.89	273	96	89	.519	254	4.01	523	50	10	0	1628.0	1,864	726	812	119	397	37	9	27	6,949	66	2.19	1.32	0.66	7.5	5.7	1.39	.297	4.49	101	3.85	95	10.30	35.5
5	Jim Kaat J. Kaat	3.00	180	19	17	.528	17	3.87	99	6	1	10	297.1	335	128	150	19	87	2	62	33	1,285	8	2.63	1.14	0.58	7.7	6.8	1.42	.293	4.54	107	3.77	107	10.14	-8.8
6	John Doherty J. Doherty	3.06	148	32	31	.508	61	4.87	177	5	2	9	521.1	613	282	316	47	140	19	30	28	2,258	13	2.42	1.26	0.81	7.8	6.2	1.44	.302	5.46	108	4.40	97	10.58	6.3
7	Lary Sorensen L. Sorensen	3.10	252	53	67	.442	145	4.40	371	27	5	5	1078.0	1,286	527	598	93	274	21	42	38	4,674	23	2.29	1.35	0.78	7.9	5.9	1.45	.305	4.99	112	3.98	101	10.74	-8.2
8	Mike Proly M. Proly	3.12	201	13	19	.406	6	3.15	130	0	0	12	374.2	358	131	153	23	137	7	54	32	1,562	5	3.29	0.95	0.55	8.3	8.8	1.32	.265	3.68	82	3.97	104	8.60	-5.4
9	Dave Vonohlen D. Vonohlen	3.17	127	7	7	.500	0	3.33	59	0	0	4	167.2	185	62	72	7	61	3	44	19	722	3	3.27	0.97	0.38	8.2	8.4	1.47	.301	3.86	88	3.72	98	9.93	1.3
10	Chris Welsh C. Welsh	3.21	122	22	31	.415	75	4.45	192	8	3	0	537.2	591	266	297	52	189	15	19	14	2,333	18	3.16	1.02	0.87	8.2	8.1	1.45	.286	4.97	122	4.38	120	9.89	-42.9
11	Geoff Zahn G. Zahn	3.26	161	66	60	.524	156	3.81	385	55	18	0	1062.2	1,135	450	518	91	287	7	2	16	4,463	15	2.43	1.34	0.77	8.6	6.4	1.34	.283	4.39	96	3.93	97	9.61	14.8
12	Jim Barr J. Barr	3.27	130	10	10	.500	16	4.04	105	1	1	5	289.1	321	130	144	28	63	8	40	16	1,226	4	1.96	1.67	0.87	8.6	5.1	1.33	.287	4.48	110	4.00	108	9.99	-10.9
13	Dan Quisenberry D. Quisenberry	3.28	642	53	44	.546	0	2.74	366	0	0	239	1003.1	1,022	306	340	54	155	7	532	65	4,084	3	1.39	2.36	0.48	9.0	3.8	1.17	.276	3.05	69	3.19	81	9.17	82.2
14	Ken Forsch K. Forsch	3.32	132	48	45	.516	120	3.65	316	40	12	1	856.0	862	347	384	74	199	28	6	11	3,565	8	2.09	1.59	0.78	8.9	5.6	1.24	.267	4.04	96	3.89	99	9.06	1.2
15	Rick Langford R. Langford	3.33	140	46	57	.447	111	3.99	320	61	6	0	865.1	918	384	430	103	216	9	12	12	3,648	16	2.25	1.48	1.07	8.8	5.9	1.31	.272	4.47	105	4.29	109	9.55	-34.7
16	Paul Splittorff P. Splittorff	3.33	123	43	37	.538	106	4.24	240	9	0	0	649.0	719	306	339	55	185	6	7	8	2,777	5	2.57	1.30	0.76	8.6	6.7	1.39	.290	4.70	106	3.96	101	9.97	-4.2
17	Larry Gura L. Gura	3.33	169	70	60	.538	156	3.99	406	44	9	1	1097.1	1,098	487	538	116	328	28	4	17	4,635	12	2.69	1.24	0.95	8.8	7.1	1.30	.261	4.41	100	4.32	110	9.01	-52.3
18	Doug Sisk D. Sisk	3.35	332	22	20	.524	0	3.27	195	0	0	33	523.1	527	190	238	15	267	20	161	33	2,298	15	4.59	0.73	0.26	8.5	11.6	1.52	.284	4.09	89	4.03	109	9.06	-19.2
19	Bob Forsch B. Forsch	3.42	310	96	77	.555	241	3.96	609	31	7	3	1601.0	1,641	705	771	129	439	27	19	52	6,715	45	2.47	1.39	0.73	9.1	6.5	1.30	.274	4.33	110	3.90	109	9.22	-62.4
20	Mark Thurmond M. Thurmond	3.44	314	40	46	.465	97	3.69	320	6	3	21	837.2	890	343	395	69	262	8	78	29	3,560	9	2.81	1.22	0.74	9.0	7.4	1.38	.283	4.24	100	4.03	106	9.56	-19.4
21	John Stuper J. Stuper	3.47	111	32	28	.533	76	3.96	191	9	1	1	495.0	528	218	249	35	183	4	19	13	2,127	14	3.33	1.04	0.64	9.0	8.6	1.44	.288	4.53	109	4.00	111	9.60	-23
22	Jim Slaton J. Slaton	3.63	209	47	46	.505	89	4.43	318	6	1	14	788.1	850	388	422	97	311	13	66	20	3,416	27	3.55	1.02	1.11	9.3	9.1	1.47	.281	4.82	114	4.74	119	9.70	-67.3
23	Mark Knudson M. Knudson	3.64	121	24	29	.453	59	4.72	195	6	2	0	482.0	563	253	279	61	128	8	29	10	2,108	15	2.39	1.52	1.14	9.3	6.1	1.43	.293	5.21	119	4.48	115	10.51	-32.1
24	Russ Swan R. Swan	3.65	168	14	22	.389	20	4.83	108	1	0	11	266.2	282	143	162	26	124	5	45	18	1,183	15	4.18	0.87	0.88	9.1	10.5	1.52	.278	5.47	119	4.74	118	9.52	-21.4
25	Albert Williams A. Williams	3.67	120	35	38	.479	97	4.24	262	15	1	2	642.2	670	303	330	68	227	12	12	17	2,752	18	3.18	1.15	0.95	9.5	8.2	1.40	.276	4.62	103	4.38	110	9.38	-29.8