which pitcher has the highest career strikeouts per nine innings with minimum 200 ip

Aroldis Chapman has the highest career K/9 when pitching at least 200 innings, with 14.68 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	14.68	795.0	834	58	46	.558	0	2.57	1,297	0	0	350	464	227	252	53	403	33	542	7	3,245	82	4.56	3.22	0.60	40.0	12.4	1.09	.282	2.85	63	2.38	57	5.25	154.1
2	Josh Hader J. Hader	14.66	498.1	457	33	30	.524	0	2.64	812	0	0	222	274	146	157	63	189	24	314	5	1,960	19	3.41	4.30	1.14	41.4	9.6	0.93	.242	2.84	64	2.83	67	4.95	76.1
3	Edwin Díaz E. Díaz	14.64	487.0	492	25	33	.431	0	2.92	792	0	0	243	338	158	170	52	173	35	373	9	1,979	31	3.20	4.58	0.96	40.0	8.7	1.05	.309	3.14	72	2.57	61	6.25	86.8
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	Craig Kimbrel C. Kimbrel	14.06	810.2	838	56	47	.544	0	2.59	1,266	0	0	440	483	233	259	73	340	40	651	11	3,260	70	3.77	3.72	0.81	38.8	10.4	1.02	.266	2.88	63	2.58	63	5.36	131.9
6	Devin Williams D. Williams	13.96	267.0	276	29	13	.690	0	2.22	414	0	0	79	154	66	83	16	126	15	115	4	1,087	16	4.25	3.29	0.54	38.1	11.6	1.05	.267	2.80	53	2.43	57	5.19	53.9
7	Spencer Strider S. Strider	13.12	378.2	76	34	16	.680	63	3.52	552	0	0	0	280	148	157	37	129	16	3	2	1,544	13	3.07	4.28	0.88	35.8	8.4	1.08	.300	3.73	82	2.68	65	6.65	61.1
8	Kirby Yates K. Yates	12.56	437.2	454	30	23	.566	0	3.21	611	0	0	96	318	156	169	58	172	29	202	13	1,816	18	3.54	3.55	1.19	33.6	9.5	1.12	.275	3.48	78	3.47	84	6.54	33.7
9	Kenley Jansen K. Jansen	12.52	898.0	905	50	38	.568	0	2.62	1,249	0	0	461	601	261	280	86	274	31	677	20	3,576	21	2.75	4.56	0.86	34.9	7.7	0.97	.266	2.81	66	2.61	64	6.02	142.9
10	Andrés Muñoz A. Muñoz	12.30	229.0	232	12	21	.364	0	2.44	313	0	0	59	145	62	74	16	89	14	100	12	918	16	3.50	3.52	0.63	34.1	9.7	1.02	.265	2.91	63	2.68	67	5.70	33.9
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	12.16	249.1	273	15	11	.577	1	2.89	337	0	0	11	170	80	98	32	114	10	39	11	1,033	9	4.11	2.96	1.16	32.6	11.0	1.14	.256	3.54	70	3.61	86	6.14	16
14	Bryan Abreu B. Abreu	12.16	298.1	286	16	11	.593	0	2.59	403	0	0	9	212	86	96	23	136	19	49	0	1,235	18	4.10	2.96	0.69	32.6	11.0	1.17	.289	2.90	64	3.02	73	6.40	36.1
15	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
16	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
17	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
18	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
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	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
21	Garrett Crochet G. Crochet	11.79	334.1	122	17	23	.425	50	2.96	438	0	0	0	268	110	122	31	105	8	18	2	1,368	10	2.83	4.17	0.83	32.0	7.7	1.12	.302	3.28	71	2.74	65	7.21	54.8
22	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
23	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
24	Tanner Scott T. Scott	11.67	408.2	424	32	26	.552	0	3.55	530	0	0	73	332	161	185	33	209	22	155	12	1,752	29	4.60	2.54	0.73	30.3	11.9	1.32	.312	4.07	83	3.32	77	7.31	44
25	Carlos Marmol C. Marmol	11.60	577.0	519	23	35	.397	13	3.57	744	0	0	117	385	229	242	49	395	51	259	22	2,521	35	6.16	1.88	0.76	29.5	15.7	1.35	.262	3.77	85	3.95	94	6.01	15.6