Gerrit Cole has the best career K/9 for the Yankees, with 10.85 per nine innings.

Interpreted as:

best k /9 with a minimum of 750 IP yankees pitcher career

	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	Gerrit Cole G. Cole	10.85	759.0	125	59	28	.678	125	3.12	915	6	4	0	593	263	279	102	185	19	0	2	3,018	13	2.19	4.95	1.21	30.3	6.1	1.03	.273	3.31	76	3.32	78	7.03	78.4
2	David Cone D. Cone	8.67	922.0	145	64	40	.615	144	3.91	888	7	1	0	829	401	431	98	398	42	0	8	3,943	47	3.89	2.23	0.96	22.5	10.1	1.33	.290	4.21	84	4.01	86	8.09	66.7
3	Masahiro Tanaka M. Tanaka	8.46	1054.1	174	78	46	.629	173	3.74	991	7	4	0	983	438	476	159	208	26	0	1	4,299	32	1.78	4.76	1.36	23.1	4.8	1.13	.283	4.06	88	3.90	89	8.39	53.3
4	Roger Clemens R. Clemens	8.27	1103.0	175	83	42	.664	174	4.01	1,014	3	2	0	1,044	491	536	116	398	41	0	8	4,684	50	3.25	2.55	0.95	21.6	8.5	1.31	.298	4.37	88	3.79	83	8.52	93.8
5	Mariano Rivera M. Rivera	8.22	1283.2	1,115	82	60	.577	10	2.21	1,173	0	0	652	998	315	340	71	286	46	952	41	5,103	13	2.01	4.10	0.50	23.0	5.6	1.00	.263	2.38	49	2.76	61	7.00	246.7
6	CC Sabathia	7.98	1918.0	307	134	88	.604	306	3.81	1,700	12	2	0	1,863	811	892	232	576	73	0	29	8,093	43	2.70	2.95	1.09	21.0	7.1	1.27	.296	4.19	90	3.91	90	8.74	87.3
7	Phil Hughes P. Hughes	7.56	780.2	182	56	50	.528	132	4.53	656	2	1	3	787	393	419	112	245	23	7	8	3,335	31	2.82	2.68	1.29	19.7	7.3	1.32	.294	4.83	107	4.30	100	9.07	1.1
8	Al Downing A. Downing	7.49	1235.1	208	72	57	.558	175	3.23	1,028	46	12	2	1,014	443	492	96	526	11	18	20	5,158	40	3.83	1.95	0.70	19.9	10.2	1.25	.263	3.58	96	3.18	91	7.39	40.8
9	Dave Righetti D. Righetti	7.44	1136.2	522	74	61	.548	76	3.11	940	13	2	224	999	393	448	65	473	16	379	37	4,811	33	3.75	1.99	0.51	19.5	9.8	1.30	.282	3.55	79	3.12	78	7.91	110.1
10	Mike Mussina M. Mussina	7.41	1553.0	249	123	72	.631	248	3.88	1,278	12	8	0	1,565	669	723	166	318	38	0	14	6,392	32	1.84	4.02	0.96	20.0	5.0	1.21	.305	4.19	87	3.50	79	9.07	158.1
11	Orlando Hernandez O. Hernandez	7.22	876.1	139	61	40	.604	136	3.96	703	8	2	1	780	386	410	114	304	38	1	8	3,683	21	3.12	2.31	1.17	19.1	8.3	1.24	.264	4.21	86	4.34	94	8.01	26.9
12	Ron Guidry R. Guidry	6.69	2392.0	368	170	91	.651	323	3.29	1,778	95	26	4	2,198	874	953	226	633	13	23	24	9,794	56	2.38	2.81	0.85	18.2	6.5	1.18	.276	3.59	84	3.26	82	8.27	192
13	Andy Pettitte A. Pettitte	6.50	2796.1	447	219	127	.633	438	3.94	2,020	24	3	0	2,951	1,223	1,355	236	889	50	2	31	11,924	61	2.86	2.27	0.76	16.9	7.5	1.37	.311	4.36	87	3.76	83	9.50	232.7
14	Bob Turley B. Turley	6.45	1269.0	234	82	52	.612	175	3.62	909	58	21	13	1,025	510	548	118	761	44	33	15	5,487	29	5.40	1.19	0.84	16.6	13.9	1.41	.248	3.89	97	4.15	111	7.27	-65.7
15	Rudy May R. May	6.27	841.2	184	54	46	.540	102	3.12	586	30	5	7	715	292	340	48	281	11	41	12	3,451	29	3.00	2.09	0.51	17.0	8.1	1.18	.264	3.64	85	3.03	81	7.65	69.2
16	Joe Page J. Page	5.94	780.1	278	57	49	.538	45	3.44	515	14	1	76	711	298	352	38	414	14	178		3,396	16	4.77	1.24	0.44	15.2	12.2	1.44	.279	4.06	92	3.48	93	8.20	23.4
17	David Wells D. Wells	5.89	851.2	124	68	28	.708	123	3.90	557	19	9	0	886	369	396	98	139	20	0	2	3,533	17	1.47	4.01	1.04	15.8	3.9	1.20	.290	4.18	87	3.80	85	9.36	62.1
18	Whitey Ford W. Ford	5.55	3170.1	498	236	106	.690	438	2.75	1,956	156	45	11	2,766	967	1,107	228	1,086	28	35	44	13,036	75	3.08	1.80	0.65	15.0	8.3	1.22	.261	3.14	75	3.26	88	7.85	156.9
19	Tommy Byrne T. Byrne	5.36	993.2	221	72	40	.643	118	3.93	592	42	10	12	799	434	480	74	763	62	65	10	4,484	21	6.91	0.78	0.67	13.2	17.0	1.57	.242	4.35	99	4.76	121	7.24	-96.9
20	Lefty Gomez L. Gomez	5.29	2498.1	367	189	101	.652	319	3.34	1,468	173	28	10	2,286	927	1,087	138	1,090	19	31		10,706	39	3.93	1.35	0.50	13.7	10.2	1.35	.269	3.92	78	3.87	94	8.24	71.7
21	Allie Reynolds A. Reynolds	5.12	1700.0	295	131	60	.686	209	3.30	967	96	27	40	1,500	624	695	111	819	40	70		7,238	46	4.34	1.18	0.59	13.4	11.3	1.36	.262	3.68	85	3.74	97	7.94	21
22	Jim Bouton J. Bouton	4.98	1013.2	197	55	51	.519	131	3.36	561	32	11	4	913	378	431	105	331	18	26	18	4,205	23	2.94	1.69	0.93	13.3	7.9	1.23	.253	3.83	97	3.82	107	8.11	-30
23	Doc Medich D. Medich	4.93	787.0	111	49	40	.551	108	3.40	431	43	9	0	765	297	323	69	239	12	2	19	3,289	18	2.73	1.80	0.79	13.1	7.3	1.28	.274	3.69	93	3.56	98	8.75	7.2
24	Stan Bahnsen S. Bahnsen	4.88	985.2	153	55	52	.514	139	3.10	534	36	8	2	901	340	382	88	312	9	10	27	4,086	29	2.85	1.71	0.80	13.1	7.6	1.23	.259	3.49	94	3.54	103	8.23	-17.7
25	Vic Raschi V. Raschi	4.87	1537.0	218	120	50	.706	207	3.47	832	99	24	3	1,347	593	659	104	620	25	5		6,434	37	3.63	1.34	0.61	12.9	9.6	1.28	.256	3.86	88	3.59	92	7.89	54.7