most single season strikeouts by relief pitcher since 2010

Since 2010, Josh Hader has struck out the most batters by a relief pitcher in a season, with 143 strikeouts in 2018.

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Data note: Strikeouts: player game data complete from 1901
Data note: Data: Retrosheet

	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	Josh Hader J. Hader	143	2018	MIL	55	6	1	.857	0	2.43	0	0	12	81.1	36	22	23	9	30	1	14	0	306	0	15.82	3.32	4.77	1.00	46.7	9.8	0.81	.220	2.55	3.98
2	Josh Hader J. Hader	138	2019	MIL	61	3	5	.375	0	2.62	0	0	37	75.2	41	22	24	15	20	4	46	2	289	0	16.41	2.38	6.90	1.78	47.8	6.9	0.81	.232	2.85	4.88
3	Carlos Marmol C. Marmol	138	2010	CHC	77	2	3	.400	0	2.55	0	0	38	77.2	40	22	23	1	52	8	70	4	332	2	15.99	6.03	2.65	0.12	41.6	15.7	1.18	.293	2.67	4.64
4	Dellin Betances D. Betances	135	2014	NYY	70	5	0	1.000	0	1.40	0	0	1	90.0	46	14	15	4	24	4	8	1	341	2	13.50	2.40	5.63	0.40	39.6	7.0	0.78	.241	1.50	4.60
5	Dellin Betances D. Betances	131	2015	NYY	74	6	4	.600	0	1.50	0	0	9	84.0	45	14	17	6	40	3	17	2	332	9	14.04	4.29	3.28	0.64	39.5	12.0	1.01	.257	1.82	4.82
6	Mason Miller M. Miller	129	2026	SDP	66	5	2	.714	0	1.67	0	0	38	70.0	37	13	16	3	26	2	57	1	272	6	16.59	3.34	4.96	0.39	47.4	9.6	0.90	.304	2.06	4.76
7	Craig Kimbrel C. Kimbrel	127	2011	ATL	79	4	3	.571	0	2.10	0	0	46	77.0	48	18	19	3	32	1	64	1	306	4	14.84	3.74	3.97	0.35	41.5	10.5	1.04	.315	2.22	5.61
8	Craig Kimbrel C. Kimbrel	126	2017	BOS	67	5	0	1.000	0	1.43	0	0	35	69.0	33	11	11	6	14	4	51	0	254	5	16.43	1.83	9.00	0.78	49.6	5.5	0.68	.260	1.43	4.30
9	Corey Knebel C. Knebel	126	2017	MIL	76	1	4	.200	0	1.78	0	0	39	76.0	48	15	15	6	40	2	48	5	309	2	14.92	4.74	3.15	0.71	40.8	12.9	1.16	.311	1.78	5.68
10	Dellin Betances D. Betances	126	2016	NYY	73	3	6	.333	0	3.08	0	0	12	73.0	54	25	31	5	28	1	20	0	299	6	15.53	3.45	4.50	0.62	42.1	9.4	1.12	.353	3.82	6.66
11	Edwin Díaz E. Díaz	124	2018	SEA	73	0	4	.000	0	1.96	0	0	57	73.1	41	16	17	5	17	6	65	0	280	3	15.22	2.09	7.29	0.61	44.3	6.1	0.79	.281	2.09	5.03
12	Andrew Miller A. Miller	123	2016	TOT	70	10	1	.909	0	1.45	0	0	12	74.1	42	12	13	8	9	2	23	0	275	1	14.89	1.09	13.67	0.97	44.7	3.3	0.69	.256	1.57	5.09
13	Liam Hendriks L. Hendriks	122	2019	OAK	73	4	4	.500	0	1.63	0	0	25	83.0	58	15	16	5	19	2	41	5	322	7	13.23	2.06	6.42	0.54	37.9	5.9	0.93	.305	1.73	6.29
14	Aroldis Chapman A. Chapman	122	2012	CIN	68	5	5	.500	0	1.51	0	0	38	71.2	35	12	13	4	23	4	52	0	276	4	15.32	2.89	5.30	0.50	44.2	8.3	0.81	.252	1.63	4.40
15	Edwin Díaz E. Díaz	118	2022	NYM	61	3	1	.750	0	1.31	0	0	32	62.0	34	9	9	3	18	2	49	1	235	2	17.13	2.61	6.56	0.44	50.2	7.7	0.84	.330	1.31	4.94
16	Aroldis Chapman A. Chapman	116	2015	CIN	65	4	4	.500	0	1.63	0	0	33	66.1	43	12	13	3	33	5	54	1	278	7	15.74	4.48	3.52	0.41	41.7	11.9	1.15	.331	1.76	5.83
17	Craig Kimbrel C. Kimbrel	116	2012	ATL	63	3	1	.750	0	1.01	0	0	42	62.2	27	7	7	3	14	2	56	0	231	5	16.66	2.01	8.29	0.43	50.2	6.1	0.65	.250	1.01	3.88
18	Dellin Betances D. Betances	115	2018	NYY	66	4	6	.400	0	2.70	0	0	4	66.2	44	20	22	7	26	5	15	2	272	4	15.52	3.51	4.42	0.95	42.3	9.6	1.05	.311	2.97	5.94
19	Liam Hendriks L. Hendriks	113	2021	CWS	69	8	3	.727	0	2.54	0	0	38	71.0	45	20	23	11	7	1	58	1	267	6	14.32	0.89	16.14	1.39	42.3	2.6	0.73	.252	2.92	5.70
20	Kyle Barraclough K. Barraclough	113	2016	MIA	75	6	3	.667	0	2.85	0	0	0	72.2	45	23	24	1	44	2	6	1	306	8	14.00	5.45	2.57	0.12	36.9	14.4	1.22	.301	2.97	5.57
21	Aaron Ashby A. Ashby	112	2026	MIL	74	13	3	.813	0	3.00	0	0	4	87.0	73	29	34	8	41	2	11	1	373	8	11.59	4.24	2.73	0.83	30.0	11.0	1.31	.310	3.52	7.55
22	Adam Ottavino A. Ottavino	112	2018	COL	75	6	4	.600	0	2.43	0	0	6	77.2	41	21	25	5	36	6	16	5	309	7	12.98	4.17	3.11	0.58	36.2	11.7	0.99	.240	2.90	4.75
23	Aroldis Chapman A. Chapman	112	2013	CIN	68	4	5	.444	0	2.54	0	0	38	63.2	37	18	18	7	29	3	55	0	258	6	15.83	4.10	3.86	0.99	43.4	11.2	1.04	.280	2.54	5.23
24	Tyler Clippard T. Clippard	112	2010	WSH	78	11	8	.579	0	3.07	0	0	1	91.0	69	31	33	8	41	2	18	4	378	1	11.08	4.05	2.73	0.79	29.6	10.8	1.21	.284	3.26	6.82
25	Brad Hand B. Hand	111	2016	SDP	82	4	4	.500	0	2.92	0	0	1	89.1	63	29	32	8	36	1	16	4	364	7	11.18	3.63	3.08	0.81	30.5	9.9	1.11	.264	3.22	6.35

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2026 Division Standings

TEAM	W	L	PCT	GB
Brewers	103	59	.636
Cubs	89	73	.549	14.0
Pirates	82	80	.506	21.0
Cardinals	77	85	.475	26.0
Reds	75	87	.463	28.0

Schedule

DATE	MATCHUP			TIME (ET)
Thu 3/25	LAA	@	MIL	2:10 PM
Sat 3/27	LAA	@	MIL	7:10 PM
Sun 3/28	LAA	@	MIL	2:10 PM
Mon 3/29	ATL	@	MIL	7:40 PM
Tue 3/30	ATL	@	MIL	7:40 PM

Last Game

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4 - 1

Final

Rays

1 - 4

Wed 28 Oct 2026

MLB 2026 Batting Leaders

HR Leaders

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Crow-Armstrong

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Schwarber

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Alonso

RBI Leaders

116

Burleson

113

Alonso

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Stewart

Batting Average Leaders

.316

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Moreno

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Arraez

Hit Leaders

191

Lopez

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Arraez

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119

Crow-Armstrong

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Arozarena

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.432

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Rumfield

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SLG Leaders

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Alvarez

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Crow-Armstrong

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Nuñez

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Simpson

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Win Leaders

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252

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248

Williams

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1.80

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1.95

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0.80

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0.87

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0.91

Rasmussen

K/9 Leaders

12.98

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12.73

Cease

12.11

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K/BB Leaders

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Worst Record ATS

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NL East	W	L	PCT	GB
Braves - y	94	68	.580
Phillies - w	88	74	.543	6.0
Marlins	80	82	.494	14.0
Nationals	77	85	.475	17.0
Mets	74	88	.457	20.0
NL Central	W	L	PCT	GB
Brewers - y	103	59	.636
Cubs - w	89	73	.549	14.0
Pirates	82	80	.506	21.0
Cardinals	77	85	.475	26.0
Reds	75	87	.463	28.0
NL West	W	L	PCT	GB
Dodgers - y	100	62	.617
Padres - w	91	71	.562	9.0
Diamondbacks	86	76	.531	14.0
Giants	65	97	.401	35.0
Rockies	58	104	.358	42.0

AL East	W	L	PCT	GB
Rays - y	98	64	.605
Yankees - w	93	68	.578	4.5
Red Sox - w	87	75	.537	11.0
Orioles	79	82	.491	18.5
Blue Jays	79	83	.488	19.0
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Guardians - y	85	77	.525
White Sox - w	84	78	.519	1.0
Twins	77	85	.475	8.0
Tigers	76	86	.469	9.0
Royals	69	93	.426	16.0
AL West	W	L	PCT	GB
Astros - y	81	81	.500
Rangers	80	82	.494	1.0
Mariners	76	86	.469	5.0
Athletics	64	98	.395	17.0
Angels	62	100	.383	19.0

MLB 2026 Scores & Schedule

Scores

DATE	MATCHUP			SCORE
Tue 9/15	MIL	@	PIT	5-1
Wed 9/16	CWS	@	CLE	3-6
Wed 9/16	SFG	@	STL	6-5
Wed 9/16	NYY	@	MIN	4-5
Wed 9/16	DET	@	TOR	1-5

Schedule

DATE	MATCHUP			TIME (ET)
Thu 3/25	TEX	@	HOU	4:00 AM
Thu 3/25	BAL	@	TBR	4:00 AM
Thu 3/25	ATL	@	LAD	4:00 AM
Thu 3/25	CWS	@	DET	4:00 AM
Thu 3/25	NYM	@	MIA	4:00 AM

Since 2010, Josh Hader has struck out the most batters by a relief pitcher in a season, with 143 strikeouts in 2018.

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