which pitcher has the highest career strikeouts per nine innings with a minimum 400 ip

Aroldis Chapman has the highest career K/9 when pitching at least 400 innings, with 14.73 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	14.73	773.1	811	57	45	.559	0	2.62	1,266	0	0	340	455	225	249	53	398	33	528	7	3,166	82	4.63	3.18	0.62	40.0	12.6	1.10	.284	2.90	64	2.42	58	5.30	146.3
2	Edwin Díaz E. Díaz	14.70	467.0	472	23	33	.411	0	3.03	763	0	0	233	330	157	169	52	168	34	357	9	1,906	30	3.24	4.54	1.00	40.0	8.8	1.07	.313	3.26	75	2.63	63	6.36	80.2
3	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	74.6
4	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
5	Kenley Jansen K. Jansen	12.61	877.2	882	49	37	.570	0	2.60	1,230	0	0	453	584	254	272	83	265	31	661	18	3,486	21	2.72	4.64	0.85	35.3	7.6	0.97	.267	2.79	66	2.57	63	5.99	143.3
6	Kirby Yates K. Yates	12.61	427.2	441	29	22	.569	0	3.16	599	0	0	95	306	150	163	56	169	29	199	13	1,771	18	3.56	3.54	1.18	33.8	9.5	1.11	.272	3.43	77	3.46	83	6.44	33.8
7	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
8	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
9	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
10	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
11	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
12	Cody Allen C. Allen	11.51	463.2	481	24	31	.436	0	3.14	593	0	0	153	375	162	179	55	193	10	291	13	1,943	40	3.75	3.07	1.07	30.5	9.9	1.23	.293	3.47	74	3.42	82	7.28	37.3
13	Tyler Glasnow T. Glasnow	11.47	681.2	154	40	32	.556	115	3.83	869	0	0	0	531	290	309	88	258	11	9	5	2,796	61	3.41	3.37	1.16	31.1	9.2	1.16	.282	4.08	93	3.49	84	7.01	52.1
14	Jake Diekman J. Diekman	11.42	602.1	705	27	34	.443	0	3.91	764	0	0	19	483	262	312	53	358	47	141	21	2,662	44	5.35	2.13	0.79	28.7	13.4	1.40	.299	4.66	95	3.77	91	7.22	23.8
15	Shohei Ohtani S. Ohtani	11.36	481.2	86	38	19	.667	86	3.01	608	1	1	0	348	161	169	53	173	24	0	2	1,951	42	3.23	3.51	0.99	31.2	8.9	1.08	.270	3.16	71	3.30	77	6.50	50.1
16	Hunter Greene H. Greene	11.33	433.2	80	22	27	.449	80	3.74	546	1	1	0	340	180	188	62	161	39	0	0	1,816	18	3.34	3.39	1.29	30.1	8.9	1.16	.276	3.90	85	3.88	89	7.06	22.1
17	Matt Barnes M. Barnes	11.31	466.1	467	33	30	.524	3	4.21	586	0	0	47	420	218	233	53	214	18	145	9	2,021	47	4.13	2.74	1.02	29.0	10.6	1.36	.319	4.50	95	3.61	86	8.11	32.6
18	Jose Fernandez J. Fernandez	11.25	471.1	76	38	17	.691	76	2.58	589	0	0	0	357	135	150	31	140	13	0	12	1,888	16	2.67	4.21	0.59	31.2	7.4	1.05	.292	2.86	68	2.43	64	6.82	73
19	Freddy Peralta F. Peralta	11.22	799.2	186	57	38	.600	137	3.70	997	1	0	1	602	329	349	102	309	40	6	3	3,311	28	3.48	3.23	1.15	30.1	9.3	1.14	.268	3.93	88	3.65	86	6.78	51.6
20	Blake Snell B. Snell	11.17	1105.2	213	77	58	.570	213	3.18	1,372	1	1	0	850	391	426	108	503	11	0	5	4,583	81	4.09	2.73	0.88	29.9	11.0	1.22	.287	3.47	78	3.35	80	6.92	100.7
21	Greg Holland G. Holland	11.13	547.2	556	30	28	.517	0	3.14	677	0	0	220	417	191	211	43	241	7	355	20	2,271	50	3.96	2.81	0.71	29.8	10.6	1.20	.287	3.47	74	3.02	73	6.85	66.2
22	Chris Sale C. Sale	11.11	2000.1	380	139	86	.618	300	3.06	2,470	16	3	12	1,636	680	732	207	466	123	25	15	8,064	47	2.10	5.30	0.93	30.6	5.8	1.05	.298	3.29	72	2.89	69	7.36	287.9
23	Héctor Neris H. Neris	11.10	602.1	611	44	42	.512	0	3.39	743	0	0	107	485	227	252	78	228	35	267	15	2,518	34	3.41	3.26	1.17	29.5	9.1	1.18	.284	3.77	82	3.69	87	7.25	35.9
24	Chad Green C. Green	11.06	466.1	355	41	28	.594	24	3.24	573	0	0	29	365	168	185	70	118	13	83	10	1,852	18	2.28	4.86	1.35	30.9	6.4	1.04	.274	3.57	76	3.50	81	7.04	44.2
25	Robbie Ray R. Ray	11.01	1303.0	241	82	73	.529	237	3.94	1,594	1	1	0	1,132	571	607	199	558	47	1	19	5,523	54	3.85	2.86	1.37	28.9	10.1	1.30	.299	4.19	94	4.08	99	7.82	3.4