Fernando Cruz had the best K/9 for the Yankees in June 2025, with 18.32 per nine innings.

	NAME	K/9	MONTH	G	W	L	W%	GS	ERA	SO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Fernando Cruz F. Cruz	18.32	June 2025	11	1	1	.500	0	3.86	19	0	9.1	4	4	4	1	6	0	0	0	38	2	5.79	3.17	0.96	50.0	15.8	1.07	.250	3.86	3.86
2	Luke Weaver L. Weaver	12.27	June 2025	4	0	1	.000	0	4.91	5	0	3.2	3	2	2	1	1	0	1	0	15	0	2.45	5.00	2.45	33.3	6.7	1.09	.250	4.91	7.36
3	Mark Leiter Jr. M. Leiter Jr.	11.25	June 2025	11	1	2	.333	0	5.63	10	0	8.0	17	5	9	1	3	0	3	0	46	2	3.38	3.33	1.13	21.7	6.5	2.50	.500	10.13	19.13
4	Devin Williams D. Williams	11.17	June 2025	10	0	0		0	0.93	12	6	9.2	5	1	1	0	0	2	7	0	36	0	0.00		0.00	33.3	0.0	0.52	.227	0.93	4.66
5	Will Warren W. Warren	10.80	June 2025	5	2	1	.667	5	2.86	34	0	28.1	21	9	9	1	11	1	0	0	116	0	3.49	3.09	0.32	29.3	9.5	1.13	.290	2.86	6.67
6	Max Fried M. Fried	9.27	June 2025	5	3	1	.750	5	1.91	34	0	33.0	24	7	8	2	5	2	0	0	126	0	1.36	6.80	0.55	27.0	4.0	0.88	.265	2.18	6.55
7	Scott Effross S. Effross	9.00	June 2025	1	0	0		0	0.00	1	0	1.0	1	0	0	0	0	0	1	0	4	0	0.00		0.00	25.0	0.0	1.00	.333	0.00	9.00
8	Jonathan Loáisiga J. Loáisiga	8.78	June 2025	12	0	1	.000	0	4.73	13	0	13.1	12	7	8	4	3	0	2	1	54	0	2.03	4.33	2.70	24.1	5.6	1.13	.235	5.40	8.10
9	Carlos Rodón C. Rodón	8.74	June 2025	6	2	2	.500	6	3.71	33	0	34.0	28	14	15	5	11	4	0	0	141	1	2.91	3.00	1.32	23.4	7.8	1.15	.261	3.97	7.41
10	Clarke Schmidt C. Schmidt	8.35	June 2025	5	2	2	.500	5	1.95	30	0	32.1	17	7	7	3	8	1	0	0	122	0	2.23	3.75	0.84	24.6	6.6	0.77	.175	1.95	4.73
11	Brent Headrick B. Headrick	7.20	June 2025	4	0	0		0	7.20	4	0	5.0	9	4	4	2	0	1	0	0	23	0	0.00		3.60	17.4	0.0	1.80	.438	7.20	16.20
12	Ian Hamilton I. Hamilton	6.52	June 2025	8	0	0		0	1.86	7	0	9.2	8	2	3	0	6	1	3	1	43	0	5.59	1.17	0.00	16.3	14.0	1.45	.276	2.79	7.45
13	Ryan Yarbrough R. Yarbrough	6.30	June 2025	4	1	1	.500	4	5.40	14	0	20.0	22	12	12	4	6	1	0	0	85	0	2.70	2.33	1.80	16.5	7.1	1.40	.300	5.40	9.90
14	Yerry De Los Santos Y. De Los Santos	4.50	June 2025	4	0	0		0	0.00	4	0	8.0	5	0	0	0	6	0	1	0	33	0	6.75	0.67	0.00	12.1	18.2	1.38	.217	0.00	5.63
15	Allan Winans A. Winans	4.26	June 2025	2	0	1	.000	1	8.53	3	0	6.1	8	6	7	1	2	2	1	0	30	0	2.84	1.50	1.42	10.0	6.7	1.58	.318	9.95	11.37
16	Tim Hill T. Hill	4.26	June 2025	14	0	1	.000	0	0.71	6	0	12.2	10	1	2	1	4	0	6	1	50	0	2.84	1.50	0.71	12.0	8.0	1.11	.231	1.42	7.11
17	JT Brubaker	2.70	June 2025	3	0	0		0	10.80	1	0	3.1	3	4	4	0	4	1	2	0	18	0	10.80	0.25	0.00	5.6	22.2	2.10	.250	10.80	8.10
18	Marcus Stroman M. Stroman	1.80	June 2025	1	1	0	1.000	1	1.80	1	0	5.0	3	1	1	1	2	0	0	0	19	0	3.60	0.50	1.80	5.3	10.5	1.00	.133	1.80	5.40