highest strikeouts per 9 innings by a pitcher all-time minimum 400 games pitched

Aroldis Chapman has the highest K/9 when pitching in 400+ games, with 14.65 per nine innings.

	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	Aroldis Chapman A. Chapman	14.65	846	58	46	.558	0	2.55	1,311	0	0	356	805.2	468	228	253	54	406	33	548	7	3,284	84	4.54	3.23	0.60	39.9	12.4	1.08	.280	2.83	62	2.38	57	5.23	156.3
2	Edwin Díaz E. Díaz	14.60	503	27	35	.435	0	2.87	808	0	0	248	498.0	344	159	172	53	178	39	381	9	2,026	32	3.22	4.54	0.96	39.9	8.8	1.05	.307	3.11	71	2.60	62	6.22	87.2
3	Josh Hader J. Hader	14.56	468	34	31	.523	0	2.64	829	0	0	226	512.1	282	150	164	65	198	24	321	6	2,019	19	3.48	4.19	1.14	41.1	9.8	0.94	.240	2.88	64	2.88	68	4.95	75.8
4	Craig Kimbrel C. Kimbrel	14.06	838	56	47	.544	0	2.59	1,266	0	0	440	810.2	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
5	Kirby Yates K. Yates	12.50	461	30	24	.556	0	3.25	615	0	0	98	442.2	323	160	174	60	176	29	206	13	1,839	18	3.58	3.49	1.22	33.4	9.6	1.13	.274	3.54	79	3.54	85	6.57	31.2
6	Kenley Jansen K. Jansen	12.48	919	53	38	.582	0	2.57	1,265	0	0	468	912.1	605	261	280	86	276	31	688	20	3,624	21	2.72	4.58	0.85	34.9	7.6	0.97	.264	2.76	65	2.59	64	5.97	147.7
7	Billy Wagner B. Wagner	11.92	853	47	40	.540	0	2.31	1,196	0	0	422	903.0	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
8	Brad Lidge B. Lidge	11.92	603	26	32	.448	1	3.54	799	0	0	225	603.1	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
9	David Robertson D. Robertson	11.84	862	66	46	.589	1	2.90	1,155	0	0	177	877.2	657	283	306	77	358	25	354	37	3,617	57	3.67	3.23	0.79	31.9	9.9	1.16	.290	3.14	70	2.94	69	6.74	123.6
10	Tanner Scott T. Scott	11.64	430	32	26	.552	0	3.63	536	0	0	74	414.1	340	167	191	36	213	23	157	12	1,782	29	4.63	2.52	0.78	30.1	12.0	1.33	.312	4.15	85	3.42	80	7.39	40.3
11	Carlos Marmol C. Marmol	11.60	519	23	35	.397	13	3.57	744	0	0	117	577.0	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	481	24	31	.436	0	3.14	593	0	0	153	463.2	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	José Alvarado J. Alvarado	11.48	400	19	26	.422	1	3.40	462	0	0	52	362.1	283	137	161	23	192	12	102	19	1,556	38	4.77	2.41	0.57	29.7	12.3	1.31	.300	4.00	81	3.13	74	7.03	43.9
14	Jake Diekman J. Diekman	11.42	705	27	34	.443	0	3.91	764	0	0	19	602.1	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	Matt Barnes M. Barnes	11.31	467	33	30	.524	3	4.21	586	0	0	47	466.1	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
16	Joe Jiménez J. Jiménez	11.23	425	20	27	.426	0	4.47	488	0	0	23	391.0	344	194	215	50	145	28	108	6	1,680	11	3.34	3.37	1.15	29.0	8.6	1.25	.303	4.95	103	3.67	86	7.92	24.6
17	Greg Holland G. Holland	11.13	556	30	28	.517	0	3.14	677	0	0	220	547.2	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
18	Héctor Neris H. Neris	11.12	643	46	43	.517	0	3.47	775	0	0	107	627.1	509	242	272	83	243	36	274	16	2,632	38	3.49	3.19	1.19	29.4	9.2	1.20	.285	3.90	84	3.74	89	7.30	33.5
19	Brad Boxberger B. Boxberger	10.95	506	31	38	.449	0	3.50	581	0	0	84	477.2	372	186	204	63	233	23	167	17	2,021	16	4.39	2.49	1.19	28.7	11.5	1.27	.276	3.84	87	4.03	100	7.01	-0.2
20	Armando Benitez A. Benitez	10.93	762	40	47	.460	0	3.13	946	0	0	289	779.0	545	271	296	95	403	16	527	32	3,253	18	4.66	2.35	1.10	29.1	12.4	1.22	.251	3.42	72	3.86	88	6.30	48.8
21	Octavio Dotel O. Dotel	10.82	758	59	50	.541	34	3.78	1,143	0	0	109	951.0	765	399	431	117	412	41	305	39	4,024	46	3.90	2.77	1.11	28.4	10.2	1.24	.280	4.08	86	3.69	84	7.24	73.6
22	Antonio Bastardo A. Bastardo	10.76	419	27	20	.574	5	4.01	470	0	0	12	393.0	304	175	184	44	192	16	93	13	1,679	34	4.40	2.45	1.01	28.0	11.4	1.26	.272	4.21	103	3.75	95	6.96	7.7
23	Koji Uehara K. Uehara	10.71	436	22	26	.458	12	2.66	572	0	0	95	480.2	350	142	153	60	78	4	207	9	1,862	9	1.46	7.33	1.12	30.7	4.2	0.89	.253	2.86	62	2.84	68	6.55	69.2
24	Raisel Iglesias R. Iglesias	10.67	580	42	55	.433	21	2.99	849	0	0	240	716.1	562	238	264	83	196	27	440	17	2,890	17	2.46	4.33	1.04	29.4	6.8	1.06	.276	3.32	70	3.22	77	7.06	78.1
25	Max Scherzer M. Scherzer	10.63	475	217	114	.656	466	3.18	3,456	12	5	0	2925.0	2,387	1,032	1,105	345	767	114	2	20	11,818	79	2.36	4.51	1.06	29.2	6.5	1.08	.286	3.40	76	3.20	77	7.34	307.8