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Team bullpen data and usage tracking

Zack Kelly
Zack Kelly
Throws: R
Primary Role(s): Reliever
Age: 30

Boston
Team Record: 10 - 10
Head Coach: Alex Cora
Pitching Coach: Andrew Bailey
Pitcher Snapshot
Pitcher Impact Rating:
72.4
IP (last 7 gm):
4.1
ERA (last 7 gm):
8.31
Team BP Power Rank:
#15

Pitcher Season Stats

Cumulative Stats
Season G ERA IP PA P/pa SO/pa BB/pa HR/pa SB/pa G/AO AVG OBP xWOBA OPS
2025 6 6.30 10.00 42 3.69 26.2% 4.8% 2.4% 0% 0.8 0.275 0.310 0.305 0.735
2025 SpringTr 7 2.35 7.20 27 3.74 29.6% 3.7% 0.0% 1% 1.33 0.154 0.185 - 0.377
2025: Home 2 10.13 2.20 15 4.40 20.0% 0.0% 0.0% 0% 0.25 0.429 0.467 - 0.967
2025: Away 4 4.91 7.10 27 3.29 14.3% 0.0% 0.0% 0% 1.17 0.192 0.222 - 0.607
2025: Vs L 6 - 5.00 19 2.67 0.0% 0.0% 0.0% % 1 0.222 0.263 - 0.596
2025: Vs R 6 - 5.00 23 3.75 25.0% 0.0% 0.0% % 0.6 0.318 0.348 - 0.848
2025 Pitch Arsenal
Game Logs
Game Date Opponent IP PA R H 2B 3B HR BB SO SB CS NP-S AVG
2025-04-15 @ Rays 2.20
7
 11 2 3 1 0 0 0 4 0 0 43-30 0.28
2025-04-12 @ White Sox 1.20
6
 7 2 1 0 0 1 1 3 0 0 27-17 0.28
2025-04-08 vs Blue Jays 1.20
6
 10 2 4 0 0 0 1 2 0 0 35-24 0.30
2025-04-04 vs Cardinals 1.00
7
 5 1 2 1 0 0 0 1 0 0 22-13 0.21
2025-04-03 @ Orioles 1.00
5
 2 0 0 0 0 0 0 0 0 0 5-3 0.11
2025-03-29 @ Rangers 2.00
6
 7 0 1 1 0 0 0 1 0 0 23-17 0.14
Advanced Stats
Advanced Stats will be released after the All-Star break

Bullpen Usage & Stats

Last 7 Days
Player IP NP-S ERA Apr-17 Apr-16 Apr-15 Apr-14 Apr-13 Apr-12 Apr-11
Zack Kelly 4.1 70-47 8.31
2.2
7
43-30
1.2
6
27-17
Justin Wilson 1.1 24-14 4.50
1.0
6
20-12
0.1
7
4-2
Robert Stock 0 0-0 4.50
Aroldis Chapman 1.2 39-28 3.38
0.1
9
5-3
1.0
9
18-14
0.1
9
16-11
Michael Fulmer 2.2 63-38 10.15
2.2
3
63-38
Tanner Houck 0 0-0 0.00
Sean Newcomb 0 0-0 9.00
Brennan Bernardino 2.0 38-25 6.00
1.0
8
19-13
1.0
8
19-12
Chris Murphy 0 0-0 13.53
Greg Weissert 2.1 34-26 0.00
1.1
5
20-15
1.0
6
14-11
Josh Winckowski 4.0 64-40 4.50
1.0
7
15-10
3.0
5
49-30
Garrett Whitlock 2.2 46-34 0.00
2.0
7
24-21
0.2
8
22-13
Kutter Crawford 0 0-0 9.00
Garrett Crochet 0 0-0 0.00
Frank German 0 0-0 4.50
Zach Penrod 0 0-0 9.00
Justin Slaten 2.0 20-13 0.00
1.0
9
11-8
1.0
8
9-5
Richard Fitts 0 0-0 7.20
IP
In
NP-S
IP
In
NP-S
IP
In
NP-S
IP
In
NP-S
IP
In
NP-S
IP
In
NP-S
IP
In
NP-S
Advanced Pitcher Traits
Games Pitched this Season:
6
Games Started this Season:
0
Pitchers versus LH batters:
Yes
Pitchers versus RH batters:
Yes
Avg Inning when called:
6
Avg Run Diff when called:
2.67
Pitches over 30 pitches:
Yes
Pitches before the 8th:
Yes
Pitches back to back days:
Rarely
Other Boston Pitchers

Justin Wilson (L)
Robert Stock (R)
Aroldis Chapman (L)
Michael Fulmer (R)
Brennan Bernardino (L)
Chris Murphy (L)
Greg Weissert (R)
Josh Winckowski (R)
Garrett Whitlock (R)
Zack Kelly (R)
Frank German (R)
Zach Penrod (L)
Justin Slaten (R)

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