highest career k/9 with a minimum of 900 ip

Kenley Jansen has the highest career K/9 when pitching at least 900 innings, with 12.48 per nine innings.

Interpreted as:

highest career k/9 by a player with a minimum of 900 ip

	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	Kenley Jansen K. Jansen	12.48	912.1	919	53	38	.582	0	2.57	1,265	0	0	468	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
2	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
3	Blake Snell B. Snell	11.21	1115.2	215	78	59	.569	215	3.18	1,390	1	1	0	858	394	429	110	506	11	0	5	4,624	82	4.08	2.75	0.89	30.1	10.9	1.22	.287	3.46	78	3.35	80	6.92	102.1
4	Chris Sale C. Sale	11.11	2047.2	387	143	87	.622	307	3.02	2,528	16	3	12	1,668	686	739	209	481	126	25	15	8,249	47	2.11	5.26	0.92	30.6	5.8	1.05	.297	3.25	71	2.88	69	7.33	297.1
5	Dylan Cease D. Cease	10.92	976.2	180	62	56	.525	180	3.85	1,185	3	3	0	818	418	460	117	409	33	0	9	4,133	52	3.77	2.90	1.08	28.7	9.9	1.26	.293	4.24	92	3.65	85	7.54	66.5
6	Robbie Ray R. Ray	10.90	1400.2	257	86	78	.524	253	3.87	1,696	2	1	0	1,207	602	641	210	590	49	1	19	5,918	58	3.79	2.87	1.35	28.7	10.0	1.28	.296	4.12	92	4.04	99	7.76	8.2
7	Jacob deGrom J. deGrom	10.84	1502.1	241	94	62	.603	241	2.55	1,809	4	2	0	1,149	426	463	139	338	24	0	13	5,901	28	2.02	5.35	0.83	30.7	5.7	0.99	.281	2.77	65	2.67	65	6.88	238.4
8	Octavio Dotel O. Dotel	10.82	951.0	758	59	50	.541	34	3.78	1,143	0	0	109	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
9	Max Scherzer M. Scherzer	10.63	2925.0	475	217	114	.656	466	3.18	3,456	12	5	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
10	Randy Johnson R. Johnson	10.61	4135.1	618	303	166	.646	603	3.29	4,875	100	37	2	3,346	1,513	1,703	411	1,497	190	7	37	17,067	109	3.26	3.26	0.89	28.6	8.8	1.17	.291	3.71	75	3.18	73	7.28	554.3
11	Stephen Strasburg S. Strasburg	10.55	1470.0	247	113	62	.646	247	3.24	1,723	2	2	0	1,217	530	582	149	394	53	0	20	5,962	44	2.41	4.37	0.91	28.9	6.6	1.10	.293	3.56	80	3.01	75	7.45	165.9
12	Yu Darvish Y. Darvish	10.53	1739.2	289	112	91	.552	289	3.62	2,036	2	1	0	1,424	699	733	221	555	79	0	8	7,149	82	2.87	3.67	1.14	28.5	7.8	1.14	.283	3.79	86	3.54	84	7.37	125.7
13	Francisco Rodriguez F. Rodriguez	10.53	976.0	948	52	53	.495	0	2.86	1,142	0	0	437	738	310	336	98	389	17	677	42	4,011	68	3.59	2.94	0.90	28.5	9.7	1.15	.271	3.10	69	3.30	79	6.81	97
14	Gerrit Cole G. Cole	10.37	1954.0	317	153	80	.657	317	3.18	2,251	8	5	0	1,627	690	740	217	500	61	0	8	7,861	58	2.30	4.50	1.00	28.6	6.4	1.09	.292	3.41	79	3.16	77	7.49	213.5
15	Corbin Burnes C. Burnes	10.36	968.0	210	63	38	.624	149	3.15	1,114	0	0	2	756	339	374	104	280	38	16	3	3,914	42	2.60	3.98	0.97	28.5	7.2	1.07	.274	3.48	75	3.25	78	7.03	100.6
16	Kerry Wood K. Wood	10.32	1380.0	446	86	75	.534	178	3.67	1,582	11	5	63	1,083	563	599	148	666	99	138	22	5,863	64	4.34	2.38	0.97	27.0	11.4	1.27	.278	3.91	86	3.82	87	7.06	84
17	Jack Flaherty J. Flaherty	10.32	950.0	182	61	52	.540	176	3.75	1,089	0	0	0	795	396	418	132	340	52	0	9	3,948	33	3.22	3.20	1.25	27.6	8.6	1.19	.284	3.96	92	3.92	95	7.53	24
18	Pedro Martinez P. Martinez	10.04	2827.1	476	219	100	.687	409	2.93	3,154	46	17	3	2,221	919	1,006	239	760	141	23	30	11,394	62	2.42	4.15	0.76	27.7	6.7	1.05	.279	3.20	66	2.91	68	7.07	454.6
19	Carlos Rodón C. Rodón	10.02	1226.1	222	86	70	.551	217	3.79	1,365	3	1	0	1,050	517	558	156	460	60	1	5	5,159	65	3.38	2.97	1.14	26.5	8.9	1.23	.287	4.10	92	3.84	91	7.71	53.2
20	Nick Pivetta N. Pivetta	9.88	1164.0	246	67	75	.472	201	4.55	1,278	2	0	3	1,072	588	616	190	412	33	13	7	4,916	53	3.19	3.10	1.47	26.0	8.4	1.27	.294	4.76	106	4.23	100	8.29	-0.1
21	Aaron Nola A. Nola	9.86	1671.0	277	105	86	.550	277	3.78	1,831	6	4	0	1,482	701	739	210	437	55	0	16	6,855	18	2.35	4.19	1.13	26.7	6.4	1.15	.294	3.98	90	3.49	81	7.98	146
22	Trevor Bauer T. Bauer	9.82	1297.2	222	83	69	.546	212	3.79	1,416	6	3	1	1,122	547	592	160	491	66	6	10	5,463	50	3.41	2.88	1.11	25.9	9.0	1.24	.289	4.11	88	3.86	91	7.78	56.9
23	Chris Archer C. Archer	9.64	1357.0	243	63	89	.414	240	3.93	1,454	3	3	0	1,232	592	654	165	476	41	1	8	5,723	72	3.16	3.05	1.09	25.4	8.3	1.26	.297	4.34	98	3.71	92	8.17	47.9
24	Clayton Kershaw C. Kershaw	9.64	2814.1	446	218	96	.694	443	2.52	3,014	25	15	0	2,162	787	864	233	697	46	1	28	11,112	107	2.23	4.32	0.75	27.1	6.3	1.02	.271	2.76	64	2.84	70	6.91	369.9
25	Kenta Maeda K. Maeda	9.62	986.2	226	68	56	.548	172	4.20	1,055	0	0	6	873	460	486	142	285	40	15	13	4,086	25	2.60	3.70	1.30	25.8	7.0	1.17	.285	4.43	102	3.89	93	7.96	33.1