Jake Bird and Griffin Jax are tied for fanning the most batters by a relief pitcher this season, with 56 strikeouts.

Interpreted as:

most strikeouts by a relief pitcher this regular season

	NAME	SO	SEASON	TM	G	W	L	W%	GS	ERA	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Jake Bird J. Bird	56	2025	COL	33	2	1	.667	0	2.06	0	0	0	43.2	36	10	11	2	16	2	3	1	178	3	11.54	3.30	3.50	0.41	31.5	9.0	1.19	.333	2.27	7.42
2	Griffin Jax G. Jax	56	2025	MIN	36	1	4	.200	0	4.05	0	0	0	33.1	33	15	16	4	8	0	2	1	141	0	15.12	2.16	7.00	1.08	39.7	5.7	1.23	.397	4.32	8.91
3	Josh Hader J. Hader	55	2025	HOU	33	5	1	.833	0	1.78	0	0	20	35.1	19	7	8	5	7	2	30	0	135	2	14.01	1.78	7.86	1.27	40.7	5.2	0.74	.212	2.04	4.84
4	Cade Smith C. Smith	53	2025	CLE	36	2	2	.500	0	2.36	0	0	3	34.1	27	9	11	0	13	2	5	1	145	1	13.89	3.41	4.08	0.00	36.6	9.0	1.17	.351	2.88	7.08
5	Brendon Little B. Little	52	2025	TOR	37	3	1	.750	0	1.98	0	0	0	36.1	23	8	13	1	21	1	2	0	150	3	12.88	5.20	2.48	0.25	34.7	14.0	1.21	.293	3.22	5.70
6	Fernando Cruz F. Cruz	50	2025	NYY	30	2	3	.400	0	3.19	0	0	2	31.0	19	11	13	3	14	2	4	0	125	3	14.52	4.06	3.57	0.87	40.0	11.2	1.06	.286	3.77	5.52
7	Ronny Henriquez R. Henriquez	50	2025	MIA	34	3	1	.750	0	2.95	0	0	2	36.2	32	12	15	6	16	3	4	2	160	1	12.27	3.93	3.13	1.47	31.3	10.0	1.31	.306	3.68	7.85
8	Abner Uribe A. Uribe	49	2025	MIL	38	2	1	.667	0	2.11	0	0	1	38.1	28	9	11	3	16	4	3	2	156	4	11.50	3.76	3.06	0.70	31.4	10.3	1.15	.298	2.58	6.57
9	Mason Miller M. Miller	49	2025	ATH	29	1	2	.333	0	4.85	0	0	15	29.2	19	16	17	4	15	1	24	1	122	3	14.87	4.55	3.27	1.21	40.2	12.3	1.15	.283	5.16	5.76
10	Bryan Abreu B. Abreu	49	2025	HOU	36	2	3	.400	0	1.78	0	0	0	35.1	24	7	7	2	19	1	5	0	149	2	12.48	4.84	2.58	0.51	32.9	12.8	1.22	.282	1.78	6.11
11	Jeremiah Estrada J. Estrada	49	2025	SDP	39	2	4	.333	0	3.50	0	0	2	36.0	31	14	17	5	14	1	5	1	153	2	12.25	3.50	3.50	1.25	32.0	9.2	1.25	.310	4.25	7.75
12	Garrett Whitlock G. Whitlock	49	2025	BOS	29	5	1	.833	0	3.60	0	0	1	40.0	31	16	17	2	19	3	5	1	169	3	11.03	4.27	2.58	0.45	29.0	11.2	1.25	.302	3.83	6.98
13	Randy Rodríguez R. Rodríguez	49	2025	SFG	33	3	1	.750	0	0.79	0	0	1	34.0	19	3	5	1	6	1	8	0	126	1	12.97	1.59	8.17	0.26	38.9	4.8	0.74	.261	1.32	5.03
14	Aroldis Chapman A. Chapman	48	2025	BOS	36	3	2	.600	0	1.36	0	0	14	33.0	17	5	6	2	10	0	20	0	126	1	13.09	2.73	4.80	0.55	38.1	7.9	0.82	.227	1.64	4.64
15	Jason Adam J. Adam	47	2025	SDP	40	6	3	.667	0	1.77	0	0	0	40.2	32	8	12	2	18	2	3	1	172	3	10.40	3.98	2.61	0.44	27.3	10.5	1.23	.291	2.66	7.08
16	Jeff Hoffman J. Hoffman	45	2025	TOR	35	6	2	.750	0	5.13	0	0	17	33.1	27	19	20	8	10	1	29	1	137	1	12.15	2.70	4.50	2.16	32.8	7.3	1.11	.260	5.40	7.29
17	Edwin Díaz E. Díaz	45	2025	NYM	30	3	0	1.000	0	2.08	0	0	15	30.1	17	7	8	2	12	3	22	0	120	5	13.35	3.56	3.75	0.59	37.5	10.0	0.96	.259	2.37	5.04
18	Alex Vesia A. Vesia	45	2025	LAD	38	2	0	1.000	0	3.06	0	0	3	32.1	24	11	11	7	10	2	6	1	129	3	12.53	2.78	4.50	1.95	34.9	7.8	1.05	.262	3.06	6.68
19	Reid Detmers R. Detmers	44	2025	LAA	31	3	2	.600	0	4.50	0	0	2	34.0	34	17	18	2	17	0	6	3	147	0	11.65	4.50	2.59	0.53	29.9	11.6	1.50	.381	4.76	9.00
20	Steven Okert S. Okert	44	2025	HOU	30	1	2	.333	0	2.60	0	0	1	34.2	17	10	11	4	6	2	5	1	128	0	11.42	1.56	7.33	1.04	34.4	4.7	0.66	.181	2.86	4.41
21	Mark Leiter Jr. M. Leiter Jr.	44	2025	NYY	37	4	4	.500	0	3.94	0	0	2	32.0	38	14	17	3	10	1	7	0	144	4	12.38	2.81	4.40	0.84	30.6	6.9	1.50	.407	4.78	10.69
22	Ben Casparius B. Casparius	44	2025	LAD	22	6	1	.857	0	3.52	0	0	0	46.0	40	18	18	3	9	0	2	0	188	0	8.61	1.76	4.89	0.59	23.4	4.8	1.07	.280	3.52	7.83
23	Bryan Baker B. Baker	43	2025	BAL	38	3	2	.600	0	2.80	0	0	2	35.1	27	11	13	6	8	0	7	0	135	0	10.95	2.04	5.38	1.53	31.9	5.9	0.99	.269	3.31	6.88
24	Emilio Pagán E. Pagán	43	2025	CIN	34	0	2	.000	0	3.18	0	0	18	34.0	18	12	14	6	11	1	27	0	133	0	11.38	2.91	3.91	1.59	32.3	8.3	0.85	.167	3.71	4.76
25	Seranthony Domínguez S. Domínguez	42	2025	BAL	33	2	2	.500	0	3.41	0	0	1	31.2	22	12	13	3	19	0	7	1	130	7	11.94	5.40	2.21	0.85	32.3	14.6	1.29	.288	3.69	6.25