Dylan Cease has the highest K/9 this season, with 11.52 per nine innings.

Interpreted as:

most so/9 with a minimum of 1 IP per team game by a player this season

	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	Dylan Cease D. Cease	11.52	2025	SDP	32	8	12	.400	32	4.55	215	0	0	0	168.0	152	85	91	21	71	5	0	2	722	5	3.80	3.03	1.13	29.8	9.8	1.33	.320	4.88	112	3.56	87	8.14	10.2
2	Garrett Crochet G. Crochet	11.18	2025	BOS	32	18	5	.783	32	2.59	255	1	1	0	205.1	165	59	62	24	46	3	0	0	814	7	2.02	5.54	1.05	31.3	5.7	1.03	.290	2.72	60	2.89	68	7.23	30.3
3	Tarik Skubal T. Skubal	11.10	2025	DET	31	13	6	.684	31	2.21	241	1	1	0	195.1	141	48	55	18	33	5	0	0	748	3	1.52	7.30	0.83	32.2	4.4	0.89	.273	2.53	55	2.45	59	6.50	37
4	Jesús Luzardo J. Luzardo	10.58	2025	PHI	32	15	7	.682	32	3.92	216	0	0	0	183.2	167	80	85	16	57	3	0	0	758	2	2.79	3.79	0.78	28.5	7.5	1.22	.324	4.17	93	2.89	69	8.18	26.8
5	Jack Flaherty J. Flaherty	10.51	2025	DET	31	8	15	.348	31	4.64	188	0	0	0	161.0	147	83	85	23	59	5	0	1	681	4	3.30	3.19	1.29	27.6	8.7	1.28	.305	4.75	115	3.85	93	8.22	5.2
6	MacKenzie Gore M. Gore	10.43	2025	WSH	30	5	15	.250	30	4.17	185	0	0	0	159.2	152	74	75	20	64	5	0	0	680	12	3.61	2.89	1.13	27.2	9.4	1.35	.325	4.23	100	3.74	89	8.57	7.8
7	Yoshinobu Yamamoto Y. Yamamoto	10.41	2025	LAD	29	11	8	.579	29	2.58	194	0	0	0	167.2	109	48	53	14	57	3	0	0	660	5	3.06	3.40	0.75	29.4	8.6	0.99	.242	2.84	62	2.98	71	5.85	22.9
8	Paul Skenes P. Skenes	10.36	2025	PIT	32	10	10	.500	32	1.97	216	1	0	0	187.2	136	41	45	11	42	6	0	0	733	2	2.01	5.14	0.53	29.5	5.7	0.95	.273	2.16	46	2.36	57	6.52	37.1
9	Freddy Peralta F. Peralta	10.36	2025	MIL	32	17	6	.739	32	2.68	201	0	0	0	174.2	121	52	53	20	66	9	0	0	714	4	3.40	3.05	1.03	28.2	9.2	1.07	.242	2.73	63	3.61	86	6.23	11.1
10	Joe Ryan J. Ryan	10.03	2025	MIN	30	13	9	.591	29	3.47	185	0	0	0	166.0	134	64	67	25	38	12	0	0	668	0	2.06	4.87	1.36	27.7	5.7	1.04	.267	3.63	85	3.77	90	7.27	7.6
11	Sonny Gray S. Gray	10.01	2025	STL	32	14	8	.636	32	4.28	201	1	1	0	180.2	185	86	93	25	38	3	0	0	753	2	1.89	5.29	1.25	26.7	5.0	1.23	.329	4.63	103	3.39	83	9.22	13.6
12	Hunter Brown H. Brown	10.00	2025	HOU	31	12	9	.571	31	2.43	206	1	0	0	185.1	133	50	55	17	57	7	0	1	729	0	2.77	3.61	0.83	28.3	7.8	1.03	.262	2.67	60	3.14	76	6.46	20.7
13	Jacob deGrom J. deGrom	9.64	2025	TEX	30	12	8	.600	30	2.97	185	0	0	0	172.2	122	57	57	26	37	3	0	0	669	3	1.93	5.00	1.36	27.7	5.5	0.92	.230	2.97	73	3.64	85	6.36	11.8
14	Logan Webb L. Webb	9.64	2025	SFG	33	14	11	.560	33	3.30	216	0	0	0	201.2	207	74	82	14	46	6	0	0	837	2	2.05	4.70	0.62	25.8	5.5	1.25	.348	3.66	80	2.67	67	9.24	30.2
15	Bryan Woo B. Woo	9.55	2025	SEA	30	15	7	.682	30	2.94	198	0	0	0	186.2	137	61	64	26	36	4	0	0	731	3	1.74	5.50	1.25	27.1	4.9	0.93	.238	3.09	77	3.47	86	6.61	11.5
16	Shane Baz S. Baz	9.52	2025	TBR	31	10	12	.455	31	4.87	176	0	0	0	166.1	158	90	91	26	64	9	0	0	711	3	3.46	2.75	1.41	24.8	9.0	1.33	.303	4.92	124	4.37	108	8.55	-6.1
17	Nick Pivetta N. Pivetta	9.41	2025	SDP	31	13	5	.722	31	2.87	190	0	0	0	181.2	129	58	63	22	50	3	0	1	721	1	2.48	3.80	1.09	26.4	6.9	0.99	.235	3.12	71	3.49	85	6.39	12.3
18	Carlos Rodón C. Rodón	9.41	2025	NYY	32	17	9	.654	32	3.04	198	0	0	0	189.1	128	64	71	21	72	8	0	0	765	4	3.42	2.75	1.00	25.9	9.4	1.06	.230	3.38	74	3.75	87	6.08	11.5
19	Cristopher Sánchez C. Sánchez	9.35	2025	PHI	31	13	5	.722	31	2.57	204	1	0	0	196.1	169	56	58	12	44	6	0	0	789	6	2.02	4.64	0.55	25.9	5.6	1.08	.300	2.66	61	2.61	62	7.75	34.6
20	Gavin Williams G. Williams	9.29	2025	CLE	31	12	5	.706	31	3.06	173	0	0	0	167.2	130	57	62	23	83	3	0	0	704	9	4.46	2.08	1.23	24.6	11.8	1.27	.254	3.33	76	4.39	106	6.98	-4.8
21	Robbie Ray R. Ray	9.18	2025	SFG	32	11	8	.579	32	3.65	186	1	0	0	182.1	148	74	81	22	73	4	0	0	755	7	3.60	2.55	1.09	24.6	9.7	1.21	.268	4.00	89	3.93	99	7.31	0.7
22	Ryan Pepiot R. Pepiot	8.96	2025	TBR	31	11	12	.478	31	3.86	167	0	0	0	167.2	134	72	77	26	61	6	0	0	679	5	3.27	2.74	1.40	24.6	9.0	1.16	.258	4.13	98	4.36	107	7.19	-6
23	Yusei Kikuchi Y. Kikuchi	8.78	2025	LAA	33	7	11	.389	33	3.99	174	0	0	0	178.1	180	79	87	24	74	3	0	3	772	8	3.73	2.35	1.21	22.5	9.6	1.42	.314	4.39	96	4.23	98	9.08	1.7
24	Chris Bassitt C. Bassitt	8.77	2025	TOR	32	11	9	.550	31	3.96	166	1	0	0	170.1	174	75	80	22	52	13	0	0	736	4	2.75	3.19	1.16	22.6	7.1	1.33	.315	4.23	98	4.01	96	9.19	3.2
25	Kevin Gausman K. Gausman	8.75	2025	TOR	31	10	11	.476	31	3.47	184	1	1	0	189.1	147	73	75	21	48	3	0	2	755	1	2.28	3.83	1.00	24.4	6.4	1.03	.253	3.57	86	3.44	82	6.99	15.6