since 1960, who has the lowest era for a reliever in a single season

Since 1960, 50 pitchers are tied for the best ERA by a relief pitcher in a season, with an ERA of 0.00 this season. The first three are Austin Pope, Clayton Kershaw and Roki Sasaki.

NAME ERA SEASON TM G W L W% GS SO 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 Austin Pope
A. Pope
0.00
2025
AZ AZ
1
0
0
0
1
0
0
0
2.0
2
0
0
0
1
0
0
0
9
0
4.50
4.50
1.00
0.00
11.1
11.1
1.50
.286
0.00
9.00
2 Clayton Kershaw
C. Kershaw
0.00
2025
LAD LAD
1
0
0
0
0
0
0
0
1.0
0
0
0
0
0
0
0
0
3
0
0.00
0.00
0.00
0.0
0.0
0.00
.000
0.00
0.00
3 Roki Sasaki
R. Sasaki
0.00
2025
LAD LAD
2
0
0
0
4
0
0
0
2.0
1
0
0
0
0
0
0
0
7
0
18.00
0.00
0.00
57.1
0.0
0.50
.333
0.00
4.50
4 Hunter Barco
H. Barco
0.00
2025
PIT PIT
2
1
0
1.000
0
3
0
0
0
3.0
3
0
0
0
0
0
0
0
12
0
9.00
0.00
0.00
25.0
0.0
1.00
.333
0.00
9.00
5 Clay Holmes
C. Holmes
0.00
2025
NYM NYM
2
0
0
0
3
0
0
0
4.2
4
0
1
0
0
0
0
0
18
1
5.79
0.00
0.00
16.7
0.0
0.86
.267
1.93
7.71
6 Jose Espada
J. Espada
0.00
2025
BAL BAL
1
0
0
0
4
0
0
0
3.0
1
0
0
0
0
0
1
0
9
0
12.00
0.00
0.00
44.4
0.0
0.33
.200
0.00
3.00
7 Isiah Kiner-Falefa
I. Kiner-Falefa
0.00
2025
TOR TOR
1
0
0
0
0
0
0
0
0.2
0
0
0
0
0
0
1
0
2
0
0.00
0.00
0.00
0.0
0.0
0.00
.000
0.00
0.00
8 Zach McKinstry
Z. McKinstry
0.00
2025
DET DET
1
0
0
0
0
0
0
0
0.1
0
0
0
0
0
0
1
0
1
0
0.00
0.00
0.00
0.0
0.0
0.00
.000
0.00
0.00
9 Michael Lorenzen
M. Lorenzen
0.00
2025
KCR KCR
1
0
0
0
1
0
0
0
1.0
0
0
0
0
0
0
0
0
3
0
9.00
0.00
0.00
33.3
0.0
0.00
.000
0.00
0.00
10 Dom Hamel
D. Hamel
0.00
2025
NYM NYM
1
0
0
0
0
0
0
0
1.0
3
0
0
0
0
1
0
0
6
0
0.00
0.00
0.00
0.0
0.0
3.00
.600
0.00
27.00
11 Michael Soroka
M. Soroka
0.00
2025
CHC CHC
5
0
0
0
5
0
0
0
6.1
3
0
4
0
4
1
1
0
28
0
7.11
5.68
1.25
0.00
17.9
14.3
1.11
.167
5.68
4.26
12 Logan Davidson
L. Davidson
0.00
2025
LAA LAA
1
0
0
0
1
0
0
0
1.0
0
0
0
0
0
0
1
0
3
0
9.00
0.00
0.00
33.3
0.0
0.00
.000
0.00
0.00
13 Garrett Acton
G. Acton
0.00
2025
TBR TBR
1
0
0
0
0
0
0
0
1.0
0
0
0
0
2
0
1
0
5
1
0.00
18.00
0.00
0.00
0.0
40.0
2.00
.000
0.00
0.00
14 Javier Assad
J. Assad
0.00
2025
CHC CHC
1
1
0
1.000
0
1
0
0
0
2.1
2
0
0
0
2
0
0
0
10
0
3.86
7.71
0.50
0.00
10.0
20.0
1.71
.286
0.00
7.71
15 Austin Slater
A. Slater
0.00
2025
NYY NYY
1
0
0
0
0
0
0
0
0.2
1
0
0
0
0
0
1
0
3
0
0.00
0.00
0.00
0.0
0.0
1.50
.333
0.00
13.50
16 Luke Maile
L. Maile
0.00
2025
KCR KCR
1
0
0
0
0
0
0
0
1.0
0
0
0
0
1
0
1
0
4
0
0.00
9.00
0.00
0.00
0.0
25.0
1.00
.000
0.00
0.00
17 Nick Raquet
N. Raquet
0.00
2025
STL STL
2
0
0
0
1
0
0
0
2.0
0
0
0
0
1
0
0
0
7
0
4.50
4.50
1.00
0.00
14.3
14.3
0.50
.000
0.00
0.00
18 Christian Roa
C. Roa
0.00
2025
MIA MIA
2
0
0
0
3
0
0
0
3.0
1
0
0
0
3
0
1
0
12
0
9.00
9.00
1.00
0.00
25.0
25.0
1.33
.167
0.00
3.00
19 Reiver Sanmartin
R. Sanmartin
0.00
2025
CIN CIN
1
0
0
0
2
0
0
0
1.2
2
0
1
0
1
0
0
1
8
1
10.80
5.40
2.00
0.00
25.0
12.5
1.80
.400
5.40
10.80
20 Ryan Fitzgerald
R. Fitzgerald
0.00
2025
MIN MIN
2
0
0
0
0
0
0
0
2.0
2
0
0
0
0
0
2
0
8
0
0.00
0.00
0.00
0.0
0.0
1.00
.250
0.00
9.00
21 Niko Kavadas
N. Kavadas
0.00
2025
LAA LAA
1
0
0
0
1
0
0
0
1.2
3
0
0
0
1
0
1
0
9
0
5.40
5.40
1.00
0.00
11.1
11.1
2.40
.429
0.00
16.20
22 Joey Estes
J. Estes
0.00
2025
ATH ATH
1
0
0
0
1
0
0
0
4.0
1
0
0
0
0
0
1
0
13
0
2.25
0.00
0.00
7.7
0.0
0.25
.083
0.00
2.25
23 Alex Lange
A. Lange
0.00
2025
DET DET
1
0
0
0
1
0
0
0
1.0
2
0
0
0
1
0
1
0
6
0
9.00
9.00
1.00
0.00
16.7
16.7
3.00
.500
0.00
18.00
24 Anthony Seigler
A. Seigler
0.00
2025
MIL MIL
1
0
0
0
0
0
0
0
1.0
1
0
0
0
0
0
1
0
4
0
0.00
0.00
0.00
0.0
0.0
1.00
.250
0.00
9.00
25 Jared Triolo
J. Triolo
0.00
2025
PIT PIT
1
0
0
0
0
0
0
0
1.0
3
0
2
1
1
0
1
0
8
0
0.00
9.00
0.00
9.00
0.0
12.5
4.00
.333
18.00
27.00
StatMuse has game-level data for ERA going back to the 1901 season.
Some of the information used here was obtained free of charge from Retrosheet.

More Diamondbacks Stats

Team Rankings

HR

214

8th

R

791

6th

SO

1,288

23rd

ERA

4.49

23rd

2025 Division Standings
TEAM W L PCT GB
Dodgers Dodgers
93
69
.574
Padres Padres
90
72
.556
3.0
Giants Giants
81
81
.500
12.0
Diamondbacks Diamondbacks
80
82
.494
13.0
Rockies Rockies
43
119
.265
50.0
Last Game
SDP Padres

90 - 72

12

Final

4

AZ Diamondbacks

80 - 82

Sun 28 Sep 2025

MLB 2025 Batting Leaders

MLB 2025 Pitching Leaders

MLB Fantasy 2025

MLB 2025 Betting

MLB 2025 Division Standings

NL East W L PCT GB
Phillies Phillies
96
66
.593
Mets Mets
83
79
.512
13.0
NL Central W L PCT GB
Brewers Brewers
97
65
.599
Cubs Cubs
92
70
.568
5.0
NL West W L PCT GB
Dodgers Dodgers
93
69
.574
Padres Padres
90
72
.556
3.0
AL East W L PCT GB
Blue Jays Blue Jays
94
68
.580
Yankees Yankees
94
68
.580
AL Central W L PCT GB
Guardians Guardians
88
74
.543
Tigers Tigers
87
75
.537
1.0
AL West W L PCT GB
Mariners Mariners
90
72
.556
Astros Astros
87
75
.537
3.0

MLB 2025 Scores & Schedule

Scores

DATE MATCHUP SCORE
Mon
9/15
ATL ATL
@
WSH WSH
6-3
Mon
9/15
CLE CLE
@
DET DET
7-5
Mon
9/15
ATH ATH
@
BOS BOS
2-1
Mon
9/15
ATL ATL
@
WSH WSH
5-0
Mon
9/15
SDP SDP
@
NYM NYM
3-8

Schedule

DATE MATCHUP TIME (ET)
Sat
10/11
CHC CHC
@
MIL MIL
8:08 PM