lowest hits per 9 innings by a pitcher with at least 50 innings pitched in one season

Kirby Yates has allowed the fewest H/9 with 50.0+ innings pitched in a season, with 3.36 per nine innings in 2024.

	NAME	H/9	IP	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	PRAA
1	Kirby Yates K. Yates	3.36	61.2	2024	TEX	61	7	2	.778	0	1.17	85	0	0	33	23	8	10	3	28	2	50	5	237	1	12.41	4.09	3.04	0.44	35.9	11.8	0.83	.168	1.46	29	2.49	60	11.3
2	Aroldis Chapman A. Chapman	3.50	54.0	2014	CIN	54	0	3	.000	0	2.00	106	0	0	36	21	12	12	1	24	2	44	0	202	4	17.67	4.00	4.42	0.17	52.5	11.9	0.83	.290	2.00	54	0.89	23	17
3	Brandon Workman B. Workman	3.64	71.2	2019	BOS	73	10	1	.909	0	1.88	104	0	0	16	29	15	18	1	45	2	30	4	286	4	13.06	5.65	2.31	0.13	36.4	15.7	1.03	.209	2.26	39	2.45	54	16.6
4	José Leclerc J. Leclerc	3.75	57.2	2018	TEX	59	2	3	.400	0	1.56	85	0	0	12	24	10	16	1	25	3	21	1	223	2	13.27	3.90	3.40	0.16	38.1	11.2	0.85	.211	2.50	34	1.89	43	15.5
5	Josh Hader J. Hader	3.84	58.2	2021	MIL	60	4	2	.667	0	1.23	102	0	0	34	25	8	8	3	24	2	42	0	224	3	15.65	3.68	4.25	0.46	45.5	10.7	0.84	.237	1.23	29	1.68	39	16.8
6	Craig Kimbrel C. Kimbrel	3.88	62.2	2012	ATL	63	3	1	.750	0	1.01	116	0	0	42	27	7	7	3	14	2	56	0	231	5	16.66	2.01	8.29	0.43	50.2	6.1	0.65	.250	1.01	26	0.77	20	21.6
7	Ryan Helsley R. Helsley	3.90	64.2	2022	STL	54	9	1	.900	0	1.25	94	0	0	19	28	9	11	6	20	0	33	1	239	1	13.08	2.78	4.70	0.84	39.3	8.4	0.74	.185	1.53	32	2.33	60	11.5
8	Jacob deGrom J. deGrom	3.91	92.0	2021	NYM	15	7	2	.778	15	1.08	146	1	1	0	40	11	14	6	11	1	0	0	324	0	14.28	1.08	13.27	0.59	45.1	3.4	0.55	.213	1.37	27	1.23	29	30.6
9	Carl Edwards Jr. C. Edwards Jr.	3.93	66.1	2017	CHC	73	5	4	.556	0	2.98	94	0	0	0	29	22	22	6	38	4	8	2	262	4	12.75	5.16	2.47	0.81	35.9	14.5	1.01	.192	2.98	69	3.39	79	6.8
10	Alexis Díaz A. Díaz	3.96	63.2	2022	CIN	59	7	3	.700	0	1.84	83	0	0	10	28	13	18	5	33	5	20	3	255	7	11.73	4.66	2.52	0.71	32.5	12.9	0.96	.178	2.54	43	3.31	79	6
11	Josh Hader J. Hader	3.98	81.1	2018	MIL	55	6	1	.857	0	2.43	143	0	0	12	36	22	23	9	30	1	14	0	306	0	15.82	3.32	4.77	1.00	46.7	9.8	0.81	.220	2.55	60	2.22	55	16.6
12	Devin Williams D. Williams	3.99	58.2	2023	MIL	61	8	3	.727	0	1.53	87	0	0	36	26	10	13	4	28	1	49	1	231	1	13.35	4.30	3.11	0.61	37.7	12.1	0.92	.198	1.99	35	2.65	60	11.4
13	Koji Uehara K. Uehara	4.00	74.1	2013	BOS	73	4	1	.800	0	1.09	101	0	0	21	33	9	10	5	9	1	40	2	265	1	12.23	1.09	11.22	0.61	38.1	3.4	0.57	.188	1.21	26	1.60	41	19.1
14	Bryan Hudson B. Hudson	4.04	62.1	2024	MIL	43	6	1	.857	0	1.73	62	0	0	0	28	12	12	7	17	3	1	0	231	1	8.95	2.45	3.65	1.01	26.8	7.4	0.72	.148	1.73	42	3.59	88	3.5
15	Eric Gagne E. Gagne	4.04	82.1	2003	LAD	77	2	3	.400	0	1.20	137	0	0	55	37	11	12	2	20	3	67	2	306	2	14.98	2.19	6.85	0.22	44.8	6.5	0.69	.243	1.31	30	0.85	20	31.8
16	Mason Miller M. Miller	4.09	61.2	2025	TOT	60	1	2	.333	0	2.63	104	0	0	22	28	18	19	5	28	1	37	2	234	3	15.18	4.09	3.71	0.73	44.4	12.0	0.91	.240	2.77	64	2.22	53	13.2
17	Aroldis Chapman A. Chapman	4.11	61.1	2025	BOS	67	5	3	.625	0	1.17	85	0	0	32	28	8	9	3	15	0	43	0	228	6	12.47	2.20	5.67	0.44	37.3	6.6	0.70	.200	1.32	27	1.73	41	16.8
18	Carlos Marmol C. Marmol	4.12	87.1	2008	CHC	82	2	4	.333	0	2.68	114	0	0	7	40	26	30	10	41	6	22	3	348	6	11.75	4.23	2.78	1.03	32.8	11.8	0.93	.169	3.09	60	3.62	82	7.5
19	Jeff Nelson J. Nelson	4.13	65.1	2001	SEA	69	4	3	.571	0	2.76	88	0	0	4	30	20	21	3	44	6	16	1	273	2	12.12	6.06	2.00	0.41	32.2	16.1	1.13	.205	2.89	64	3.24	75	8.1
20	Aroldis Chapman A. Chapman	4.21	51.1	2018	NYY	55	3	0	1.000	0	2.45	93	0	0	32	24	14	15	2	30	5	43	0	212	9	16.31	5.26	3.10	0.35	43.9	14.2	1.05	.268	2.63	58	2.08	48	12.5
21	Billy Wagner B. Wagner	4.22	74.2	1999	HOU	66	4	1	.800	0	1.57	124	0	0	39	35	13	14	5	23	1	55	1	286	2	14.95	2.77	5.39	0.60	43.4	8.0	0.78	.226	1.69	37	1.64	38	23.6
22	Jose Valverde J. Valverde	4.29	50.1	2003	ARI	54	2	1	.667	0	2.15	71	0	0	10	24	12	16	4	26	2	33	2	204	2	12.70	4.65	2.73	0.72	34.8	12.7	0.99	.198	2.86	48	2.91	65	8.5
23	Craig Kimbrel C. Kimbrel	4.30	69.0	2017	BOS	67	5	0	1.000	0	1.43	126	0	0	35	33	11	11	6	14	4	51	0	254	5	16.43	1.83	9.00	0.78	49.6	5.5	0.68	.260	1.43	31	1.41	32	22.7
24	Aroldis Chapman A. Chapman	4.32	50.0	2011	CIN	54	4	1	.800	0	3.60	71	0	0	1	24	20	21	2	41	2	13	0	207	4	12.78	7.38	1.73	0.36	34.3	19.8	1.30	.242	3.78	94	3.28	83	3.7
25	Grant Balfour G. Balfour	4.32	58.1	2008	TBR	51	6	2	.750	0	1.54	82	0	0	4	28	10	10	3	24	0	12	1	224	2	12.65	3.70	3.42	0.46	36.6	10.7	0.89	.217	1.54	37	2.22	52	13.5