Eric Gagne has the fewest home runs allowed / 9 by a Cy Young winner in a season, with 0.22 in 2003.

Interpreted as:

lowest hr/9 for a cy young award in a regular season by a player

	NAME	HR/9	CY	HR	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Eric Gagne E. Gagne	0.22	1	2	2003	LAD	77	2	3	.400	0	1.20	137	0	0	55	82.1	37	11	12	20	3	67	2	306	2	14.98	2.19	6.85	44.8	6.5	0.69	.243	1.31	30	0.85	20	4.04	31.8
2	Rollie Fingers R. Fingers	0.33	1	3	1981	MIL	47	6	3	.667	0	1.04	61	0	0	28	78.0	55	9	9	13	1	41	5	297	1	7.04	1.50	4.69	20.5	4.4	0.87	.237	1.04	30	2.07	58	6.35	13.4
3	Bruce Sutter B. Sutter	0.33	1	3	1979	CHC	62	6	6	.500	0	2.22	110	0	0	37	101.1	67	25	29	32	0	56	5	403	9	9.77	2.84	3.44	27.3	7.9	0.98	.248	2.58	54	1.88	48	5.95	22.5
4	Greg Maddux G. Maddux	0.44	1	4	1994	ATL	25	16	6	.727	25	1.56	156	10	3	0	202.0	150	35	44	31	6	0	3	774	3	6.95	1.38	5.03	20.2	4.0	0.90	.253	1.96	37	2.39	55	6.68	43.7
5	Dennis Eckersley D. Eckersley	0.56	1	5	1992	OAK	69	7	1	.875	0	1.91	93	0	0	51	80.0	62	17	17	11	1	65	6	309	0	10.46	1.24	8.45	30.1	3.6	0.91	.286	1.91	52	1.71	44	6.98	19.4
6	Mark Davis M. Davis	0.67	1	6	1989	SDP	70	4	3	.571	0	1.85	92	0	0	44	92.2	66	19	21	31	2	65	1	370	8	8.94	3.01	2.97	24.9	8.4	1.05	.251	2.04	53	2.68	74	6.41	9.8
7	Willie Hernandez W. Hernandez	0.67	1	6	1984	DET	80	9	3	.750	0	1.92	112	0	0	32	140.1	96	30	30	36	4	68	8	548	2	7.18	2.31	3.11	20.4	6.6	0.94	.231	1.92	49	2.58	63	6.16	23.3
8	Corbin Burnes C. Burnes	0.78	1	7	2021	MIL	28	11	5	.688	28	2.43	234	0	0	0	167.0	123	45	47	34	6	0	0	657	5	12.61	1.83	6.88	35.6	5.2	0.94	.309	2.53	58	1.62	38	6.63	48.9
9	Shane Bieber S. Bieber	0.78	1	7	2020	CLE	12	8	1	.889	12	1.63	122	0	0	0	77.1	46	14	15	21	1	0	0	297	5	14.20	2.44	5.81	41.1	7.1	0.87	.267	1.75	37	2.06	46	5.35	20.5
10	Greg Maddux G. Maddux	0.78	1	7	1992	CHC	35	20	11	.645	35	2.18	199	9	4	0	268.0	201	65	68	70	14	0	7	1,061	5	6.68	2.35	2.84	18.8	6.6	1.01	.252	2.28	61	2.57	71	6.75	30.5
11	Sparky Lyle S. Lyle	0.78	1	7	1977	NYY	72	13	5	.722	0	2.17	68	0	0	26	137.0	131	33	41	33	2	60	6	554	10	4.47	2.17	2.06	12.3	6.0	1.20	.279	2.69	55	3.17	79	8.61	13
12	Dean Chance D. Chance	0.78	1	7	1964	LAA	46	20	9	.690	35	1.65	207	15	11	4	278.1	194	51	56	86	2	7	9	1,093	9	6.69	2.78	2.41	18.9	7.9	1.01	.236	1.81	48	2.39	67	6.27	37.9
13	Greg Maddux G. Maddux	0.89	1	8	1995	ATL	28	19	2	.905	28	1.63	181	10	3	0	209.2	147	38	39	23	4	0	3	785	1	7.77	0.99	7.87	23.1	2.9	0.81	.244	1.67	39	2.25	52	6.31	46.9
14	Chris Sale C. Sale	1	1	9	2024	ATL	29	18	3	.857	29	2.38	225	0	0	0	177.2	141	47	48	39	8	0	0	702	4	11.40	1.98	5.77	32.1	5.6	1.01	.314	2.43	57	2.08	52	7.14	38.1
15	Trevor Bauer T. Bauer	1	1	9	2020	CIN	11	5	4	.556	11	1.73	100	2	2	0	73.0	41	14	17	17	3	0	1	278	3	12.33	2.10	5.88	36.0	6.1	0.79	.215	2.10	36	2.87	61	5.05	14.1
16	Clayton Kershaw C. Kershaw	1	1	9	2014	LAD	27	21	3	.875	27	1.77	239	6	2	0	198.1	139	39	42	31	2	0	0	749	7	10.85	1.41	7.71	31.9	4.1	0.86	.278	1.91	51	1.81	50	6.31	40.5
17	Pedro Martinez P. Martinez	1	1	9	1999	BOS	31	23	4	.852	29	2.07	313	5	1	0	213.1	160	49	56	37	9	1	1	835	6	13.20	1.56	8.46	37.5	4.4	0.92	.323	2.36	42	1.38	30	6.75	79.4
18	Roger Clemens R. Clemens	1	1	9	1997	TOR	34	21	7	.750	34	2.05	292	9	3	0	264.0	204	60	65	68	12	0	1	1,044	4	9.95	2.32	4.29	28.0	6.5	1.03	.294	2.22	45	2.24	50	6.95	66.3
19	John Denny J. Denny	1	1	9	1983	PHI	36	19	6	.760	36	2.37	139	7	1	0	242.2	229	64	77	53	4	0	5	983	6	5.16	1.97	2.62	14.1	5.4	1.16	.283	2.86	65	2.78	75	8.49	24.9
20	Gaylord Perry G. Perry	1	1	9	1978	SDP	37	21	6	.778	37	2.73	154	5	2	0	260.2	241	79	96	66	2	0	8	1,055	4	5.32	2.28	2.33	14.6	6.3	1.18	.282	3.31	82	2.62	77	8.32	23.5
21	Mike Marshall M. Marshall	1	1	9	1974	LAD	106	15	12	.556	0	2.42	143	0	0	21	208.1	191	56	66	56	1	83	1	857	5	6.18	2.42	2.55	16.7	6.5	1.19	.281	2.85	70	2.58	71	8.25	23.9
22	Jacob deGrom J. deGrom	1.11	1	10	2018	NYM	32	10	9	.526	32	1.70	269	1	0	0	217.0	152	41	48	46	5	0	3	835	2	11.16	1.91	5.85	32.2	5.5	0.91	.281	1.99	44	1.98	50	6.30	49
23	Jake Arrieta J. Arrieta	1.11	1	10	2015	CHC	33	22	6	.786	33	1.77	236	4	3	0	229.0	150	45	52	48	6	0	2	870	6	9.28	1.89	4.92	27.1	5.5	0.86	.246	2.04	45	2.34	60	5.90	39
24	Tim Lincecum T. Lincecum	1.11	1	10	2009	SFG	32	15	7	.682	32	2.48	261	4	2	0	225.1	168	62	69	68	6	0	2	905	11	10.42	2.72	3.84	28.8	7.5	1.05	.282	2.76	60	2.33	57	6.71	45.4
25	Clayton Kershaw C. Kershaw	1.22	1	11	2013	LAD	33	16	9	.640	33	1.83	232	3	2	0	236.0	164	48	55	52	3	0	2	908	12	8.85	1.98	4.46	25.6	5.7	0.92	.251	2.10	51	2.38	64	6.25	35.4