relievers with the highest k/9 2023

Caleb Boushley had the best K/9 by a relief pitcher in a season in 2023, with 19.29 per nine innings in his rookie season.

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  • Data note: Strikeouts Per Nine Innings: player game data complete from 1901
  • Data note: Data: Retrosheet
NAMEK/9SEASONTMGWLW%GSERASOCGSHOSVIPHERRHRBBHBPGFIBBTBFWPBB/9K/BBHR/9K%BB%WHIPBABIPRAH/9
1Caleb Boushley
C. Boushley
19.29
2023
1
1
0
1.000
0
3.86
5
0
0
0
2.1
1
1
1
1
2
0
1
1
10
1
7.71
2.50
3.86
50.0
20.0
1.29
.000
3.86
3.86
2Sean Reid-Foley
S. Reid-Foley
18.78
2023
8
0
1
.000
0
3.52
16
0
0
0
7.2
4
3
3
0
6
0
1
0
34
0
7.04
2.67
0.00
47.1
17.6
1.30
.333
3.52
4.70
3Yoendrys Gómez
Y. Gómez
18.00
2023
1
0
0
0
0.00
4
0
0
0
2.0
1
0
0
0
0
1
1
0
8
0
0.00
0.00
50.0
0.0
0.50
.333
0.00
4.50
4Jose Espada
J. Espada
18.00
2023
1
0
0
0
0.00
2
0
0
0
1.0
0
0
0
0
2
0
1
0
5
0
18.00
1.00
0.00
40.0
40.0
2.00
.000
0.00
0.00
5Orion Kerkering
O. Kerkering
18.00
2023
3
1
0
1.000
0
3.00
6
0
0
0
3.0
3
1
1
0
2
0
0
0
14
0
6.00
3.00
0.00
42.9
14.3
1.67
.500
3.00
9.00
6John McMillon
J. McMillon
18.00
2023
4
0
0
0
2.25
8
0
0
0
4.0
1
1
1
1
0
0
3
0
13
0
0.00
2.25
61.5
0.0
0.25
.000
2.25
2.25
7Ryder Ryan
R. Ryan
18.00
2023
1
0
0
0
0.00
2
0
0
0
1.0
0
0
0
0
1
0
0
0
4
0
9.00
2.00
0.00
50.0
25.0
1.00
.000
0.00
0.00
8Alex Speas
A. Speas
18.00
2023
3
0
2
.000
0
13.50
4
0
0
0
2.0
2
3
3
0
5
0
1
1
12
1
22.50
0.80
0.00
33.3
41.7
3.50
.667
13.50
9.00
9Guillo Zuñiga
G. Zuñiga
18.00
2023
2
0
0
0
4.50
4
0
0
0
2.0
2
1
1
0
0
0
2
0
8
0
0.00
0.00
50.0
0.0
1.00
.500
4.50
9.00
10Darren McCaughan
D. McCaughan
18.00
2023
3
0
0
0
5.40
10
0
0
0
5.0
7
3
5
1
3
0
3
0
27
0
5.40
3.33
1.80
37.0
11.1
2.00
.462
9.00
12.60
11Félix Bautista
F. Bautista
16.23
2023
56
8
2
.800
0
1.48
110
0
0
33
61.0
30
10
14
4
26
2
46
0
237
7
3.84
4.23
0.59
46.4
11.0
0.92
.274
2.07
4.43
12Luke Little
L. Little
16.20
2023
7
0
0
0
0.00
12
0
0
0
6.2
5
0
0
0
4
1
3
0
30
1
5.40
3.00
0.00
40.0
13.3
1.35
.385
0.00
6.75
13Prelander Berroa
P. Berroa
16.20
2023
2
0
0
0
0.00
3
0
0
0
1.2
0
0
0
0
3
0
0
0
8
1
16.20
1.00
0.00
37.5
37.5
1.80
.000
0.00
0.00
14Aroldis Chapman
A. Chapman
15.89
2023
TOT
61
6
5
.545
0
3.09
103
0
0
6
58.1
37
20
24
4
36
1
18
2
249
9
5.55
2.86
0.62
41.4
14.5
1.25
.314
3.70
5.71
15Nick Hernandez
N. Hernandez
15.00
2023
2
0
0
0
12.00
5
0
0
0
3.0
3
4
4
1
4
2
0
0
18
0
12.00
1.25
3.00
27.8
22.2
2.33
.333
12.00
9.00
16Alek Jacob
A. Jacob
15.00
2023
3
0
0
0
0.00
5
0
0
0
3.0
0
0
0
0
1
0
2
0
10
0
3.00
5.00
0.00
50.0
10.0
0.33
.000
0.00
0.00
17Daniel Hudson
D. Hudson
15.00
2023
3
0
0
0
0.00
5
0
0
1
3.0
2
0
0
0
3
0
1
0
14
0
9.00
1.67
0.00
35.7
21.4
1.67
.333
0.00
6.00
18Daysbel Hernández
D. Hernández
14.73
2023
4
1
0
1.000
0
7.36
6
0
0
0
3.2
6
3
3
1
3
0
2
0
20
0
7.36
2.00
2.45
30.0
15.0
2.45
.500
7.36
14.73
19Chris Paddack
C. Paddack
14.40
2023
2
1
0
1.000
0
5.40
8
0
0
0
5.0
6
3
3
1
1
0
0
0
22
1
1.80
8.00
1.80
36.4
4.5
1.40
.417
5.40
10.80
20Shawn Dubin
S. Dubin
14.40
2023
2
0
0
0
10.80
8
0
0
0
5.0
9
6
6
1
1
0
1
0
25
0
1.80
8.00
1.80
32.0
4.0
2.00
.533
10.80
16.20
21Kody Funderburk
K. Funderburk
14.25
2023
11
2
0
1.000
0
0.75
19
0
0
0
12.0
6
1
1
1
5
1
4
0
47
0
3.75
3.80
0.75
40.4
10.6
0.92
.238
0.75
4.50
22José Alvarado
J. Alvarado
13.94
2023
42
0
2
.000
0
1.74
64
0
0
10
41.1
30
8
15
3
18
0
12
1
172
3
3.92
3.56
0.65
37.2
10.5
1.16
.310
3.27
6.53
23Joe Kelly
J. Kelly
13.73
2023
TOT
42
2
5
.286
0
4.12
60
0
0
1
39.1
29
18
22
3
18
2
6
0
168
6
4.12
3.33
0.69
35.7
10.7
1.19
.306
5.03
6.64
24Angel Perdomo
A. Perdomo
13.66
2023
30
3
2
.600
0
3.72
44
0
0
0
29.0
21
12
14
3
11
3
8
3
117
0
3.41
4.00
0.93
37.6
9.4
1.10
.321
4.34
6.52
25Matt Brash
M. Brash
13.63
2023
78
9
4
.692
0
3.06
107
0
0
4
70.2
65
24
26
3
29
6
7
0
308
11
3.69
3.69
0.38
34.7
9.4
1.33
.380
3.31
8.28

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HR

26

Bauers

Jake Bauers

RBI

100

Turang

Brice Turang

AVG

.306

Vaughn

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Team Pitching Leaders

W

16

Misiorowski

Jacob Misiorowski

K

252

Misiorowski

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ERA

1.80

Misiorowski

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Team Rankings

HR

154

28th

R

832

2nd

SO

1,544

2nd

ERA

3.51

2nd

2026 Division Standings
TEAMWLPCTGB
Brewers Brewers
103
59
.636
89
73
.549
14.0
82
80
.506
21.0
77
85
.475
26.0
75
87
.463
28.0
Schedule
DATEMATCHUPTIME (ET)
Thu
3/25
@
2:10 PM
Sat
3/27
@
7:10 PM
Sun
3/28
@
2:10 PM
Mon
3/29
@
7:40 PM
Tue
3/30
@
7:40 PM
Last Game
MIL Brewers

4 - 1

4

Final

1

TBR Rays

1 - 4

Wed 28 Oct 2026

MLB 2026 Batting Leaders

MLB 2026 Pitching Leaders

MLB Fantasy 2026

MLB 2026 Betting

MLB 2026 Standings

NL EastWLPCTGB
94
68
.580
88
74
.543
6.0
80
82
.494
14.0
77
85
.475
17.0
74
88
.457
20.0
NL CentralWLPCTGB
103
59
.636
Cubs Cubs - w
89
73
.549
14.0
82
80
.506
21.0
77
85
.475
26.0
75
87
.463
28.0
NL WestWLPCTGB
100
62
.617
91
71
.562
9.0
86
76
.531
14.0
65
97
.401
35.0
58
104
.358
42.0
AL EastWLPCTGB
Rays Rays - y
98
64
.605
93
68
.578
4.5
87
75
.537
11.0
79
82
.491
18.5
79
83
.488
19.0
AL CentralWLPCTGB
85
77
.525
84
78
.519
1.0
77
85
.475
8.0
76
86
.469
9.0
69
93
.426
16.0
AL WestWLPCTGB
81
81
.500
80
82
.494
1.0
76
86
.469
5.0
64
98
.395
17.0
62
100
.383
19.0

MLB 2026 Scores & Schedule

Scores

DATEMATCHUPSCORE
Tue
9/15
@
5-1
Wed
9/16
@
3-6
Wed
9/16
@
6-5
Wed
9/16
@
4-5
Wed
9/16
@
1-5

Schedule

DATEMATCHUPTIME (ET)
Thu
3/25
@
4:00 AM
Thu
3/25
@
4:00 AM
Thu
3/25
@
4:00 AM
Thu
3/25
@
4:00 AM
Thu
3/25
@
4:00 AM