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

Aroldis Chapman has the best career K/9 when pitching at least 200 innings, with 14.71 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	14.71	776.0	814	57	46	.553	0	2.62	1,268	0	0	341	457	226	250	53	399	33	530	7	3,178	82	4.63	3.18	0.61	39.9	12.6	1.10	.284	2.90	64	2.42	58	5.30	146.8
2	Josh Hader J. Hader	14.69	476.2	435	29	29	.500	0	2.66	778	0	0	207	264	141	151	58	186	23	294	5	1,880	18	3.51	4.18	1.10	41.4	9.9	0.94	.247	2.85	65	2.80	67	4.98	74.7
3	Edwin Díaz E. Díaz	14.65	470.0	475	23	33	.411	0	3.01	765	0	0	234	330	157	169	52	169	34	360	9	1,917	30	3.24	4.53	1.00	39.9	8.8	1.06	.310	3.24	74	2.63	63	6.32	80.7
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	249.2	258	28	12	.700	0	2.20	391	0	0	72	143	61	78	15	123	13	106	3	1,020	14	4.43	3.18	0.54	38.3	12.1	1.07	.268	2.81	53	2.45	58	5.15	49.7
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	13.45	334.2	68	31	11	.738	55	3.47	500	0	0	0	249	129	137	33	110	13	3	2	1,363	12	2.96	4.55	0.89	36.7	8.1	1.07	.306	3.68	81	2.59	62	6.70	58.4
8	Kirby Yates K. Yates	12.62	428.2	442	29	22	.569	0	3.17	601	0	0	95	308	151	164	56	169	29	200	13	1,776	18	3.55	3.56	1.18	33.8	9.5	1.11	.274	3.44	77	3.45	83	6.47	34.3
9	Kenley Jansen K. Jansen	12.61	879.1	885	49	38	.563	0	2.62	1,232	0	0	453	586	256	274	84	266	31	664	18	3,494	21	2.72	4.63	0.86	35.3	7.6	0.97	.267	2.80	66	2.58	64	6.00	142.2
10	Andrés Muñoz A. Muñoz	12.38	216.0	218	10	20	.333	0	2.42	297	0	0	53	137	58	68	15	84	13	91	11	865	12	3.50	3.54	0.63	34.3	9.7	1.02	.268	2.83	62	2.66	67	5.71	32.4
11	Alex Vesia A. Vesia	12.27	233.1	253	14	11	.560	1	2.93	318	0	0	9	160	76	94	30	110	8	34	10	969	8	4.24	2.89	1.16	32.8	11.4	1.16	.258	3.63	71	3.63	86	6.17	14.9
12	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
13	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
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	Bryan Abreu B. Abreu	12.00	276.2	266	14	9	.609	0	2.67	369	0	0	9	200	82	92	21	127	18	47	0	1,151	17	4.13	2.91	0.68	32.1	11.0	1.18	.291	2.99	65	3.06	74	6.51	32.3
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	11.75	275.0	113	13	21	.382	41	3.01	359	0	0	0	219	92	104	24	94	8	18	2	1,136	8	3.08	3.82	0.79	31.6	8.3	1.14	.300	3.40	73	2.79	66	7.17	43.9
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	Pete Fairbanks P. Fairbanks	11.72	222.0	232	19	20	.487	2	3.24	289	0	0	71	176	80	94	17	94	7	118	3	935	20	3.81	3.07	0.69	30.9	10.1	1.22	.301	3.81	79	2.93	71	7.14	29.8
24	Tanner Scott T. Scott	11.70	388.1	403	31	24	.564	0	3.48	505	0	0	64	312	150	171	30	203	21	144	12	1,667	28	4.70	2.49	0.70	30.3	12.2	1.33	.311	3.96	81	3.30	77	7.23	42.8
25	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