Mason Miller had the best K/9 with 10.0+ innings pitched this season, with 15.18 per nine innings.

Interpreted as:

most k/9 by a player min 10 innings pitched this regular season

	NAME	K/9	IP	SEASON	TM	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	Mason Miller M. Miller	15.18	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	4.09	3.71	0.73	44.4	12.0	0.91	.240	2.77	64	2.22	53	4.09	13.2
2	Cole Ragans C. Ragans	14.30	61.2	2025	KCR	13	3	3	.500	13	4.67	98	0	0	0	53	32	33	7	20	2	0	0	257	3	2.92	4.90	1.02	38.1	7.8	1.18	.354	4.82	109	2.50	60	7.74	11.5
3	Chase Burns C. Burns	13.92	43.1	2025	CIN	13	0	3	.000	8	4.57	67	0	0	0	41	22	25	5	16	0	1	0	188	0	3.32	4.19	1.04	35.6	8.5	1.32	.360	5.19	102	2.64	60	8.52	8
4	Fernando Cruz F. Cruz	13.50	48.0	2025	NYY	49	3	4	.429	0	3.56	72	0	0	2	33	19	21	5	24	3	4	0	200	5	4.50	3.00	0.94	36.0	12.0	1.19	.292	3.94	87	3.17	74	6.19	5.9
5	Griffin Jax G. Jax	13.50	66.0	2025	TOT	73	1	7	.125	2	4.23	99	0	0	0	64	31	33	7	21	1	6	3	283	0	2.86	4.71	0.95	35.0	7.4	1.29	.368	4.50	105	2.51	61	8.73	11.9
6	Connelly Early C. Early	13.50	19.1	2025	BOS	4	1	2	.333	4	2.33	29	0	0	0	17	5	6	0	4	1	0	0	79	0	1.86	7.25	0.00	36.7	5.1	1.09	.378	2.79	54	0.90	21	7.91	7
7	Jeremiah Estrada J. Estrada	13.32	73.0	2025	SDP	77	4	5	.444	0	3.45	108	0	0	3	58	28	31	12	27	3	7	2	304	3	3.33	4.00	1.48	35.5	8.9	1.16	.299	3.82	85	3.54	87	7.15	4.5
8	Bryan Abreu B. Abreu	13.31	71.0	2025	HOU	70	3	4	.429	0	2.28	105	0	0	7	51	18	18	4	31	4	19	0	296	4	3.93	3.39	0.51	35.5	10.5	1.15	.309	2.28	56	2.38	58	6.46	13.9
9	Edwin Díaz E. Díaz	13.30	66.1	2025	NYM	62	6	3	.667	0	1.63	98	0	0	28	37	12	14	4	21	8	48	0	258	7	2.85	4.67	0.54	38.0	8.1	0.87	.260	1.90	40	2.27	55	5.02	13.5
10	Grant Taylor G. Taylor	13.25	36.2	2025	CWS	36	2	4	.333	2	4.91	54	0	0	6	37	20	20	0	15	0	10	1	157	5	3.68	3.60	0.00	34.4	9.6	1.42	.420	4.91	119	1.41	33	9.08	11.5
11	Kyle Bradish K. Bradish	13.22	32.0	2025	BAL	6	1	1	.500	6	2.53	47	0	0	0	23	9	9	3	10	1	0	0	126	0	2.81	4.70	0.84	37.3	7.9	1.03	.308	2.53	63	2.44	60	6.47	5.9
12	Devin Williams D. Williams	13.06	62.0	2025	NYY	67	4	6	.400	0	4.79	90	0	0	18	45	33	37	5	25	4	29	1	259	4	3.63	3.60	0.73	34.7	9.7	1.13	.296	5.37	117	2.68	62	6.53	10.9
13	Josh Hader J. Hader	12.99	52.2	2025	HOU	48	6	2	.750	0	2.05	76	0	0	28	29	12	16	8	16	2	41	1	206	2	2.73	4.75	1.37	36.9	7.8	0.85	.202	2.73	51	3.24	79	4.96	5.2
14	Félix Bautista F. Bautista	12.98	34.2	2025	BAL	35	1	1	.500	0	2.60	50	0	0	19	16	10	10	3	23	0	28	0	142	1	5.97	2.17	0.78	35.2	16.2	1.13	.197	2.60	65	3.36	82	4.15	2.8
15	Justin Martinez J. Martinez	12.91	15.1	2025	AZ	17	1	2	.333	0	4.11	22	0	0	5	7	7	8	1	12	3	9	1	67	2	7.04	1.83	0.59	32.8	17.9	1.24	.207	4.70	96	4.04	101	4.11	-0.1
16	Erik Sabrowski E. Sabrowski	12.89	29.1	2025	CLE	33	0	1	.000	0	1.84	42	0	0	0	14	6	8	2	21	3	3	0	121	0	6.44	2.00	0.61	34.7	17.4	1.19	.226	2.45	45	3.61	87	4.30	1.7
17	Craig Kimbrel C. Kimbrel	12.75	12.0	2025	TOT	14	0	1	.000	0	2.25	17	0	0	0	10	3	4	2	7	0	5	0	49	0	5.25	2.43	1.50	34.7	14.3	1.42	.348	3.00	56	4.21	102	7.50	-0.1
18	Evan Sisk E. Sisk	12.74	17.2	2025	TOT	19	1	1	.500	0	3.57	25	0	0	0	16	7	7	1	10	2	5	0	80	3	5.09	2.50	0.51	31.3	12.5	1.47	.357	3.57	83	3.07	74	8.15	2.1
19	Cade Smith C. Smith	12.71	73.2	2025	CLE	76	8	5	.615	0	2.93	104	0	0	16	55	24	31	4	19	4	30	3	300	3	2.32	5.47	0.49	34.7	6.3	1.00	.302	3.79	72	1.95	47	6.72	18
20	Aroldis Chapman A. Chapman	12.47	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	2.20	5.67	0.44	37.3	6.6	0.70	.200	1.32	27	1.73	41	4.11	16.8
21	David Bednar D. Bednar	12.35	62.2	2025	TOT	64	6	5	.545	0	2.30	86	0	0	27	46	16	18	4	19	1	51	2	251	4	2.73	4.53	0.57	34.3	7.6	1.04	.298	2.59	54	2.17	52	6.61	14
22	Mason Montgomery M. Montgomery	12.33	46.0	2025	TBR	57	1	3	.250	0	5.67	63	0	0	1	49	29	32	6	27	1	11	0	209	1	5.28	2.33	1.17	30.1	12.9	1.65	.384	6.26	145	3.91	97	9.59	0.7
23	Will Klein W. Klein	12.33	15.1	2025	LAD	14	1	1	.500	0	2.35	21	0	0	0	14	4	6	0	10	2	5	0	70	0	5.87	2.10	0.00	30.0	14.3	1.57	.378	3.52	57	2.74	65	8.22	2.5
24	Noah Davis N. Davis	12.27	11.0	2025	TOT	9	0	2	.000	0	18.00	15	0	0	0	22	22	24	7	6	7	3	0	65	1	4.91	2.50	5.73	23.1	9.2	2.55	.500	19.64	438	12.22	291	18.00	-9.7
25	Edwin Uceta E. Uceta	12.20	76.0	2025	TBR	70	10	3	.769	0	3.79	103	0	0	1	62	32	33	11	27	8	11	3	321	0	3.20	3.81	1.30	32.1	8.4	1.17	.297	3.91	97	3.68	91	7.34	3.1