Randy Johnson had 8.65 K/9 in his rookie season in 1988.

	NAME	K/9	SEASON	TM	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	Randy Johnson R. Johnson	8.65	1988	MON	4	3	0	1.000	4	2.42	25	1	0	0	26.0	23	7	8	3	7	0	0	0	109	3	2.42	3.57	1.04	22.9	6.4	1.15	.270	2.77	70	3.14	91	7.96	0.9
2	Randy Johnson R. Johnson	7.28	1989	TOT	29	7	13	.350	28	4.82	130	2	0	0	160.2	147	86	100	13	96	3	1	2	715	7	5.38	1.35	0.73	18.2	13.4	1.51	.283	5.60	125	4.04	105	8.23	-3.3
3	Randy Johnson R. Johnson	7.95	1990	SEA	33	14	11	.560	33	3.65	194	5	2	0	219.2	174	89	103	26	120	5	0	2	944	4	4.92	1.62	1.07	20.6	12.7	1.34	.247	4.22	92	4.28	107	7.13	-6.8
4	Randy Johnson R. Johnson	10.19	1991	SEA	33	13	10	.565	33	3.98	228	2	1	0	201.1	151	89	96	15	152	12	0	0	889	12	6.79	1.50	0.67	25.6	17.1	1.50	.282	4.29	96	4.00	99	6.75	1
5	Randy Johnson R. Johnson	10.31	1992	SEA	31	12	14	.462	31	3.77	241	6	2	0	210.1	154	88	104	13	144	18	0	1	922	13	6.16	1.67	0.56	26.1	15.6	1.42	.279	4.45	96	3.60	91	6.59	7.9
6	Randy Johnson R. Johnson	10.86	1993	SEA	35	19	8	.704	34	3.24	308	10	3	1	255.1	185	92	97	22	99	16	1	1	1,043	8	3.49	3.11	0.78	29.5	9.5	1.11	.273	3.42	74	3.04	70	6.52	36.2
7	Randy Johnson R. Johnson	10.67	1994	SEA	23	13	6	.684	23	3.19	204	9	4	0	172.0	132	61	65	14	72	6	0	2	694	5	3.77	2.83	0.73	29.4	10.4	1.19	.296	3.40	67	3.17	67	6.91	29.9
8	Randy Johnson R. Johnson	12.35	1995	SEA	30	18	2	.900	30	2.48	294	6	3	0	214.1	159	59	65	12	65	6	0	1	866	5	2.73	4.52	0.50	33.9	7.5	1.05	.301	2.73	53	2.08	44	6.68	62
9	Randy Johnson R. Johnson	12.47	1996	SEA	14	5	0	1.000	8	3.67	85	0	0	1	61.1	48	25	27	8	25	2	2	0	256	3	3.67	3.40	1.17	33.2	9.8	1.19	.294	3.96	74	3.41	69	7.04	10.5
10	Randy Johnson R. Johnson	12.30	1997	SEA	30	20	4	.833	29	2.28	291	5	2	0	213.0	147	54	60	20	77	10	0	2	850	4	3.25	3.78	0.85	34.2	9.1	1.05	.281	2.54	50	2.82	62	6.21	41.3
11	Randy Johnson R. Johnson	12.12	1998	TOT	34	19	11	.633	34	3.28	329	10	6	0	244.1	203	89	102	23	86	14	0	1	1,014	7	3.17	3.83	0.85	32.4	8.5	1.18	.320	3.76	72	2.89	65	7.48	42.2
12	Randy Johnson R. Johnson	12.06	1999	ARI	35	17	9	.654	35	2.48	364	12	2	0	271.2	207	75	86	30	70	9	0	3	1,079	4	2.32	5.20	0.99	33.7	6.5	1.02	.292	2.85	53	2.75	59	6.86	57.2
13	Randy Johnson R. Johnson	12.56	2000	ARI	35	19	7	.731	35	2.64	347	8	3	0	248.2	202	73	89	23	76	6	0	1	1,001	5	2.75	4.57	0.83	34.7	7.6	1.12	.326	3.22	56	2.53	53	7.31	61.1
14	Randy Johnson R. Johnson	13.41	2001	ARI	35	21	6	.778	34	2.49	372	3	2	0	249.2	181	69	74	19	71	18	1	2	994	8	2.56	5.24	0.68	37.4	7.1	1.01	.315	2.67	55	2.12	48	6.52	63.9
15	Randy Johnson R. Johnson	11.56	2002	ARI	35	24	5	.828	35	2.32	334	8	4	0	260.0	197	67	78	26	71	13	0	1	1,035	3	2.46	4.70	0.90	32.3	6.9	1.03	.289	2.70	54	2.65	61	6.82	47
16	Randy Johnson R. Johnson	9.87	2003	ARI	18	6	8	.429	18	4.26	125	1	1	0	114.0	125	54	61	16	27	8	0	3	489	1	2.13	4.63	1.26	25.6	5.5	1.33	.348	4.82	95	3.58	80	9.87	11
17	Randy Johnson R. Johnson	10.62	2004	ARI	35	16	14	.533	35	2.60	290	4	2	0	245.2	177	71	88	18	44	10	0	1	964	3	1.61	6.59	0.66	30.1	4.6	0.90	.264	3.22	57	2.29	51	6.48	59.7
18	Randy Johnson R. Johnson	8.42	2005	NYY	34	17	8	.680	34	3.79	211	4	0	0	225.2	207	95	102	32	47	12	0	2	920	3	1.87	4.49	1.28	22.9	5.1	1.13	.283	4.07	88	3.77	87	8.26	13.8
19	Randy Johnson R. Johnson	7.55	2006	NYY	33	17	11	.607	33	5.00	172	2	0	0	205.0	194	114	125	28	60	10	0	1	860	3	2.63	2.87	1.23	20.0	7.0	1.24	.281	5.49	110	4.26	94	8.52	5.8
20	Randy Johnson R. Johnson	11.44	2007	ARI	10	4	3	.571	10	3.81	72	0	0	0	56.2	52	24	26	7	13	4	0	3	233	1	2.06	5.54	1.11	30.9	5.6	1.15	.328	4.13	81	3.19	69	8.26	8.8
21	Randy Johnson R. Johnson	8.46	2008	ARI	30	11	10	.524	30	3.91	173	2	0	0	184.0	184	80	92	24	44	6	0	6	778	2	2.15	3.93	1.17	22.2	5.7	1.24	.301	4.50	87	3.75	85	9.00	13.1
22	Randy Johnson R. Johnson	8.06	2009	SFG	22	8	6	.571	17	4.88	86	0	0	0	96.0	97	52	55	19	31	2	2	2	412	5	2.91	2.77	1.78	20.9	7.5	1.33	.285	5.16	119	4.90	119	9.09	-8.9