Cole Ragans has the highest K/9 this season, with 13.50 per nine innings.

Interpreted as:

strikeouts per 9 with a minimum of 1 IP per team game leaders 2025

	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	Cole Ragans C. Ragans	13.50	2025	KCR	6	1	1	.500	6	4.40	46	0	0	0	30.2	27	15	16	4	9	1	0	0	128	2	2.64	5.11	1.17	35.9	7.0	1.17	.338	4.70	107	2.75	68	7.92	4.5
2	Logan Gilbert L. Gilbert	13.05	2025	SEA	6	1	1	.500	6	2.37	44	0	0	0	30.1	18	8	8	3	6	1	0	0	117	2	1.78	7.33	0.89	37.6	5.1	0.79	.238	2.37	64	2.15	55	5.34	6.1
3	MacKenzie Gore M. Gore	12.95	2025	WSH	7	2	3	.400	7	3.51	59	0	0	0	41.0	36	16	16	5	9	1	0	0	165	2	1.98	6.56	1.10	35.8	5.5	1.10	.341	3.51	86	2.52	62	7.90	6.8
4	Max Meyer M. Meyer	12.44	2025	MIA	6	2	3	.400	6	3.18	47	0	0	0	34.0	30	12	13	4	11	1	0	0	142	0	2.91	4.27	1.06	33.1	7.7	1.21	.329	3.44	75	2.90	73	7.94	4.1
5	Zack Wheeler Z. Wheeler	11.66	2025	PHI	7	2	1	.667	7	3.48	57	0	0	0	44.0	35	17	17	7	9	2	0	0	174	0	1.84	6.33	1.43	32.8	5.2	1.00	.283	3.48	84	3.30	81	7.16	3.7
6	Yoshinobu Yamamoto Y. Yamamoto	11.38	2025	LAD	6	3	2	.600	6	1.06	43	0	0	0	34.0	23	4	7	2	11	0	0	0	132	1	2.91	3.91	0.53	32.6	8.3	1.00	.276	1.85	26	2.28	56	6.09	6.6
7	Tylor Megill T. Megill	11.32	2025	NYM	6	3	2	.600	6	1.74	39	0	0	0	31.0	23	6	10	1	12	2	0	0	131	1	3.48	3.25	0.29	29.8	9.2	1.13	.286	2.90	44	2.33	59	6.68	5.6
8	Carlos Rodón C. Rodón	11.14	2025	NYY	7	4	3	.571	7	3.43	52	0	0	0	42.0	22	16	18	6	19	0	0	0	164	1	4.07	2.74	1.29	31.7	11.6	0.98	.184	3.86	87	3.81	91	4.71	1.7
9	Shane Baz S. Baz	11.05	2025	TBR	5	3	0	1.000	5	2.45	36	0	0	0	29.1	20	8	8	3	9	2	0	0	114	0	2.76	4.00	0.92	31.6	7.9	0.99	.266	2.45	65	3.08	78	6.14	2.9
10	Dylan Cease D. Cease	10.92	2025	SDP	6	1	2	.333	6	5.76	36	0	0	0	29.2	36	19	21	3	12	0	0	1	136	0	3.64	3.00	0.91	26.5	8.8	1.62	.388	6.37	146	3.18	80	10.92	2.6
11	Michael King M. King	10.91	2025	SDP	6	3	1	.750	6	2.18	40	1	1	0	33.0	24	8	9	3	11	1	0	0	135	2	3.00	3.64	0.82	29.6	8.1	1.06	.263	2.45	55	2.93	74	6.55	3.8
12	Logan Webb L. Webb	10.89	2025	SFG	7	3	2	.600	7	2.83	50	0	0	0	41.1	39	13	14	1	11	0	0	0	167	1	2.40	4.55	0.22	29.9	6.6	1.21	.362	3.05	71	1.77	46	8.49	9.8
13	Jack Flaherty J. Flaherty	10.58	2025	DET	6	1	3	.250	6	3.34	38	0	0	0	32.1	25	12	12	5	11	1	0	0	132	0	3.06	3.45	1.39	28.8	8.3	1.11	.260	3.34	86	3.85	96	6.96	0.6
14	Clay Holmes C. Holmes	10.57	2025	NYM	6	3	1	.750	6	2.64	36	0	0	0	30.2	26	9	11	0	13	2	0	0	131	2	3.82	2.77	0.00	27.5	9.9	1.27	.325	3.23	67	2.20	56	7.63	6
15	Hunter Greene H. Greene	10.55	2025	CIN	6	3	2	.600	6	2.70	43	0	0	0	36.2	25	11	11	6	6	2	0	0	143	2	1.47	7.17	1.47	30.1	4.2	0.85	.221	2.70	62	3.51	83	6.14	2.8
16	Tarik Skubal T. Skubal	10.38	2025	DET	6	3	2	.600	6	2.34	40	0	0	0	34.2	31	9	9	3	5	1	0	0	139	0	1.30	8.00	0.78	28.8	3.6	1.04	.311	2.34	60	2.41	60	8.05	6.2
17	Joe Ryan J. Ryan	10.32	2025	MIN	6	2	2	.500	6	3.18	39	0	0	0	34.0	27	12	12	5	4	5	0	0	134	0	1.06	9.75	1.32	29.1	3.0	0.91	.272	3.18	81	3.49	86	7.15	2.2
18	Garrett Crochet G. Crochet	10.23	2025	BOS	7	3	2	.600	7	2.05	50	0	0	0	44.0	28	10	13	2	18	0	0	0	175	0	3.68	2.78	0.41	28.6	10.3	1.05	.248	2.66	49	2.62	64	5.73	7.2
19	Chris Bassitt C. Bassitt	10.22	2025	TOR	6	2	2	.500	6	2.62	39	0	0	0	34.1	33	10	10	2	7	2	0	0	144	2	1.83	5.57	0.52	27.1	4.9	1.17	.330	2.62	67	2.35	58	8.65	6.5
20	Jesús Luzardo J. Luzardo	10.16	2025	PHI	6	3	0	1.000	6	1.73	41	0	0	0	36.1	29	7	10	1	10	0	0	0	145	1	2.48	4.10	0.25	28.3	6.9	1.07	.301	2.48	42	2.00	49	7.18	8.2
21	Nick Pivetta N. Pivetta	9.93	2025	SDP	6	5	1	.833	6	1.78	39	0	0	0	35.1	21	7	7	2	8	0	0	0	133	0	2.04	4.88	0.51	29.3	6.0	0.82	.226	1.78	45	2.28	58	5.35	6.6
22	Zac Gallen Z. Gallen	9.74	2025	AZ	6	1	4	.200	6	5.57	35	0	0	0	32.1	30	20	20	5	15	1	0	0	143	1	4.18	2.33	1.39	24.5	10.5	1.39	.287	5.57	134	4.41	114	8.35	-2
23	Hunter Brown H. Brown	9.73	2025	HOU	6	4	1	.800	6	1.22	40	0	0	0	37.0	24	5	6	1	7	0	0	0	134	0	1.70	5.71	0.24	29.9	5.2	0.84	.267	1.46	31	1.83	46	5.84	9.1
24	Eduardo Rodriguez E. Rodriguez	9.64	2025	AZ	6	1	3	.250	6	6.06	35	0	0	0	32.2	39	22	25	6	8	0	0	0	145	2	2.20	4.38	1.65	24.1	5.5	1.44	.344	6.89	145	4.06	105	10.74	-0.7
25	Aaron Nola A. Nola	9.51	2025	PHI	6	0	5	.000	6	5.40	37	0	0	0	35.0	37	21	22	6	12	1	0	0	150	1	3.09	3.08	1.54	24.7	8.0	1.40	.330	5.66	131	4.31	106	9.51	-0.9