which pitcher has the highest career strikeouts per nine innings with a minimum of 200 innings pitched

Aroldis Chapman has the highest career K/9 when pitching at least 200 innings, with 14.67 per nine innings.

	NAME	K/9	IP	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	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	Aroldis Chapman A. Chapman	14.67	784.0	822	58	46	.558	0	2.61	1,278	0	0	344	462	227	251	53	402	33	535	7	3,209	82	4.61	3.18	0.61	39.8	12.5	1.10	.283	2.88	64	2.41	58	5.30	148.9
2	Josh Hader J. Hader	14.67	484.2	443	29	29	.500	0	2.64	790	0	0	213	266	142	152	59	188	23	302	5	1,909	18	3.49	4.20	1.10	41.4	9.8	0.94	.244	2.82	64	2.79	66	4.94	76.1
3	Edwin Díaz E. Díaz	14.67	477.1	482	24	33	.421	0	2.96	778	0	0	238	331	157	169	52	172	35	366	9	1,943	31	3.24	4.52	0.98	40.0	8.9	1.05	.308	3.19	73	2.61	62	6.24	82.8
4	Dellin Betances D. Betances	14.45	394.1	374	21	23	.477	1	2.53	633	0	0	36	240	111	124	26	183	28	86	5	1,613	28	4.18	3.46	0.59	39.2	11.3	1.07	.288	2.83	61	2.39	56	5.48	78.8
5	Devin Williams D. Williams	14.09	257.1	266	29	12	.707	0	2.20	403	0	0	73	148	63	80	16	124	13	107	3	1,048	15	4.34	3.25	0.56	38.5	11.8	1.06	.268	2.80	53	2.44	57	5.18	51.5
6	Craig Kimbrel C. Kimbrel	14.06	809.2	837	56	47	.544	0	2.59	1,265	0	0	440	482	233	259	73	339	40	651	11	3,257	70	3.77	3.73	0.81	38.8	10.4	1.01	.266	2.88	63	2.58	63	5.36	131.9
7	Spencer Strider S. Strider	13.36	343.2	70	31	13	.705	57	3.51	510	0	0	0	256	134	142	34	115	16	3	2	1,402	13	3.01	4.43	0.89	36.4	8.2	1.08	.305	3.72	82	2.65	64	6.70	57.3
8	Kirby Yates K. Yates	12.60	430.0	444	29	23	.558	0	3.22	602	0	0	95	312	154	167	57	170	29	200	13	1,785	18	3.56	3.54	1.19	33.7	9.5	1.12	.275	3.50	79	3.48	84	6.53	32.9
9	Kenley Jansen K. Jansen	12.57	885.2	891	49	38	.563	0	2.62	1,237	0	0	457	592	258	276	84	270	31	670	18	3,523	21	2.74	4.58	0.85	35.1	7.7	0.97	.267	2.80	66	2.59	64	6.02	142.8
10	Andrés Muñoz A. Muñoz	12.29	222.2	225	11	20	.355	0	2.51	304	0	0	57	143	62	72	16	85	13	96	11	892	14	3.44	3.58	0.65	34.1	9.5	1.02	.268	2.91	65	2.68	67	5.78	32.9
11	Ken Giles K. Giles	12.26	355.1	362	14	18	.438	0	2.71	484	0	0	115	283	107	121	28	114	5	208	5	1,454	24	2.89	4.25	0.71	33.3	7.8	1.12	.310	3.06	66	2.45	58	7.17	68
12	Rob Dibble R. Dibble	12.17	477.0	385	27	25	.519	0	2.98	645	0	0	89	332	158	169	27	238	12	204	25	1,979	36	4.49	2.71	0.51	32.6	12.0	1.19	.289	3.19	77	2.43	61	6.26	74.2
13	Alex Vesia A. Vesia	12.17	239.2	260	14	11	.560	1	2.93	324	0	0	10	167	78	96	32	112	8	37	11	997	8	4.21	2.89	1.20	32.5	11.2	1.16	.259	3.61	71	3.69	88	6.27	13.3
14	Trevor Rosenthal T. Rosenthal	12.12	364.0	373	12	25	.324	0	3.36	490	0	0	132	304	136	145	19	177	22	207	8	1,570	23	4.38	2.77	0.47	31.2	11.3	1.32	.331	3.59	85	2.74	70	7.52	48.2
15	Corey Knebel C. Knebel	11.94	306.2	312	13	16	.448	4	3.26	407	0	0	72	237	111	122	34	143	11	137	13	1,282	7	4.20	2.85	1.00	31.7	11.2	1.24	.295	3.58	79	3.43	83	6.96	24.9
16	Billy Wagner B. Wagner	11.92	903.0	853	47	40	.540	0	2.31	1,196	0	0	422	601	232	262	82	300	33	703	26	3,600	43	2.99	3.99	0.82	33.2	8.3	1.00	.261	2.61	54	2.72	63	5.99	159
17	Brad Lidge B. Lidge	11.92	603.1	603	26	32	.448	1	3.54	799	0	0	225	492	237	257	57	287	34	368	41	2,589	46	4.28	2.78	0.85	30.9	11.1	1.29	.308	3.83	82	3.26	75	7.34	72.7
18	Bryan Abreu B. Abreu	11.89	284.2	273	14	10	.583	0	2.66	376	0	0	9	205	84	94	22	132	18	47	0	1,184	18	4.17	2.85	0.70	31.8	11.1	1.18	.288	2.97	65	3.11	76	6.48	31.7
19	David Robertson D. Robertson	11.85	876.2	861	66	46	.589	1	2.91	1,154	0	0	177	656	283	306	77	357	25	354	37	3,612	57	3.67	3.23	0.79	31.9	9.9	1.16	.290	3.14	70	2.94	69	6.73	123.6
20	Garrett Crochet G. Crochet	11.81	301.0	117	14	23	.378	45	2.93	395	0	0	0	241	98	110	28	99	8	18	2	1,238	8	2.96	3.99	0.84	31.9	8.0	1.13	.301	3.29	71	2.79	66	7.21	47.5
21	Michael Feliz M. Feliz	11.81	250.0	228	17	9	.654	1	5.29	328	0	0	1	241	147	156	43	109	7	54	2	1,097	18	3.92	3.01	1.55	29.9	9.9	1.40	.325	5.62	127	4.16	98	8.68	2.6
22	Tanner Scott T. Scott	11.73	394.1	410	31	25	.554	0	3.63	514	0	0	65	323	159	181	32	205	21	145	12	1,698	28	4.68	2.51	0.73	30.3	12.1	1.34	.314	4.13	85	3.33	78	7.37	41.8
23	José Leclerc J. Leclerc	11.72	369.1	360	12	21	.364	3	3.34	481	0	0	40	251	137	151	32	205	21	141	8	1,563	25	5.00	2.35	0.78	30.8	13.1	1.23	.266	3.68	76	3.53	81	6.12	34.4
24	John Rocker J. Rocker	11.70	255.1	280	13	22	.371	0	3.42	332	0	0	88	200	97	115	23	164	12	176	17	1,130	29	5.78	2.02	0.81	29.4	14.5	1.43	.295	4.05	76	3.73	83	7.05	21.9
25	Pete Fairbanks P. Fairbanks	11.70	227.0	237	19	20	.487	2	3.17	295	0	0	73	178	80	94	17	97	7	122	3	955	20	3.85	3.04	0.67	30.9	10.2	1.21	.299	3.73	77	2.92	70	7.06	30.7