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2025 Stats
W
1
L
3
ERA
4.58
WHIP
1.33
IP
35.1
SO
35
SV
0
HLD
3
G
28
GS
0
Career Stats
W
8
L
6
ERA
4.15
WHIP
1.31
IP
115.0
SO
113
SV
0
HLD
12
G
98
GS
3
Year-by-Year Pitching
| Year | Team | G | GS | IP | W | L | SV | SO | ERA | WHIP | Awards |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | BOS | 13 | — | 13.2 | 1 | — | — | 11 | 3.95 | 1.32 | |
| 2023 | BOS | 8 | — | 9.1 | — | — | — | 6 | 3.86 | 1.61 | |
| 2024 | BOS | 49 | 3 | 56.2 | 6 | 3 | — | 61 | 3.97 | 1.25 | |
| 2025 | BOS | 28 | — | 35.1 | 1 | 3 | — | 35 | 4.58 | 1.33 |
Spring Training
Pitching
| Year | Team | G | GS | IP | W | L | SV | SO | ERA | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|
| 2019 | LAA | 2 | — | 2.0 | 1 | — | 1 | 2 | 0.00 | 1.50 |
| 2022 | BOS | 3 | — | 3.0 | 1 | — | — | 1 | 0.00 | 1.67 |
| 2023 | BOS | 8 | — | 10.0 | 1 | — | — | 7 | 2.70 | 1.40 |
| 2024 | BOS | 3 | — | 3.0 | — | — | 1 | 3 | 6.00 | 2.67 |
| 2025 | BOS | 7 | — | 7.2 | — | — | — | 8 | 2.35 | 0.65 |
| 2026 | BOS | 7 | — | 6.2 | 1 | — | 2 | 4 | 5.40 | 1.80 |
Postseason
Pitching
| Year | Team | G | GS | IP | W | L | SV | SO | ERA | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | BOS | 1 | — | 0.1 | — | — | — | 1 | 0.00 | 0.00 |
Game Logs
Season selector loads one year at a time.
Pitching
| Date | Opponent | IP | H | R | ER | BB | SO | HR |
|---|---|---|---|---|---|---|---|---|
| 2025-09-28 | vs DET | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2025-09-26 | vs DET | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 2025-09-25 | @ TOR | 0.2 | 1 | 1 | 1 | 0 | 0 | 1 |
| 2025-09-21 | @ TB | 1.0 | 2 | 2 | 2 | 0 | 1 | 0 |
| 2025-09-19 | @ TB | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2025-09-17 | vs ATH | 0.2 | 1 | 0 | 0 | 0 | 1 | 0 |
| 2025-09-16 | vs ATH | 1.0 | 1 | 0 | 0 | 0 | 3 | 0 |
| 2025-09-12 | vs NYY | 1.0 | 1 | 0 | 0 | 2 | 0 | 0 |
| 2025-09-08 | @ ATH | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2025-09-07 | @ AZ | 0.1 | 2 | 1 | 1 | 1 | 1 | 0 |
| 2025-09-03 | vs CLE | 4.0 | 2 | 0 | 0 | 0 | 4 | 0 |
| 2025-06-29 | vs TOR | 1.0 | 2 | 1 | 1 | 1 | 1 | 0 |
| 2025-06-25 | @ LAA | 1.2 | 2 | 0 | 0 | 0 | 4 | 0 |
| 2025-06-22 | @ SF | 1.1 | 3 | 1 | 1 | 0 | 0 | 1 |
| 2025-06-20 | @ SF | 0.2 | 0 | 0 | 0 | 1 | 2 | 0 |
| 2025-06-17 | @ SEA | 1.2 | 0 | 0 | 0 | 0 | 2 | 0 |
| 2025-06-09 | vs TB | 1.0 | 1 | 2 | 1 | 3 | 1 | 0 |
| 2025-06-08 | @ NYY | 0.1 | 2 | 0 | 0 | 0 | 0 | 0 |
| 2025-06-06 | @ NYY | 2.0 | 1 | 0 | 0 | 0 | 4 | 0 |
| 2025-06-03 | vs LAA | 1.0 | 0 | 1 | 0 | 1 | 0 | 0 |
| 2025-05-25 | vs BAL | 2.0 | 1 | 2 | 1 | 1 | 0 | 0 |
| 2025-04-20 | vs CWS | 0.0 | 1 | 3 | 3 | 0 | 0 | 0 |
| 2025-04-15 | @ TB | 2.2 | 3 | 2 | 2 | 0 | 4 | 0 |
| 2025-04-12 | @ CWS | 1.2 | 1 | 2 | 2 | 1 | 3 | 1 |
| 2025-04-08 | vs TOR | 1.2 | 4 | 2 | 2 | 1 | 2 | 0 |
| 2025-04-04 | vs STL | 1.0 | 2 | 1 | 1 | 0 | 1 | 0 |
| 2025-04-03 | @ BAL | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2025-03-29 | @ TEX | 2.0 | 1 | 0 | 0 | 0 | 1 | 0 |
Transactions
Entire history • newest first.
2026-03-23
Boston Red Sox optioned RHP Zack Kelly to Worcester Red Sox.
2025-09-01
Boston Red Sox recalled RHP Zack Kelly from Worcester Red Sox.
2025-08-02
Boston Red Sox optioned RHP Zack Kelly to Worcester Red Sox.
2025-07-24
Boston Red Sox sent RHP Zack Kelly on a rehab assignment to Greenville Drive.
2025-07-24
Boston Red Sox sent RHP Zack Kelly on a rehab assignment to Greenville Drive.
2025-06-03
Boston Red Sox recalled RHP Zack Kelly from Worcester Red Sox.
2025-05-27
Boston Red Sox optioned RHP Zack Kelly to Worcester Red Sox.
2025-05-25
Boston Red Sox recalled RHP Zack Kelly from Worcester Red Sox.
2025-04-22
Boston Red Sox optioned RHP Zack Kelly to Worcester Red Sox.
2025-04-16
RHP Zack Kelly changed number to 76.
2025-04-15
RHP Zack Kelly changed number to 42.
2024-10-01
Boston Red Sox recalled RHP Zack Kelly from Worcester Red Sox.
2024-09-14
Boston Red Sox optioned RHP Zack Kelly to Worcester Red Sox.
2024-06-05
Boston Red Sox recalled RHP Zack Kelly from Worcester Red Sox.
2024-05-26
Boston Red Sox optioned RHP Zack Kelly to Worcester Red Sox.
2024-04-24
Boston Red Sox recalled RHP Zack Kelly from Worcester Red Sox.
2024-03-22
Boston Red Sox optioned RHP Zack Kelly to Worcester Red Sox.
2023-09-24
Boston Red Sox activated RHP Zack Kelly from the 60-day injured list.
2023-09-16
Boston Red Sox sent RHP Zack Kelly on a rehab assignment to Worcester Red Sox.
2023-09-13
Boston Red Sox sent RHP Zack Kelly on a rehab assignment to Portland Sea Dogs.
2023-09-05
Boston Red Sox sent RHP Zack Kelly on a rehab assignment to Salem Red Sox.
2023-09-01
Boston Red Sox sent RHP Zack Kelly on a rehab assignment to Greenville Drive.
2023-04-16
Boston Red Sox transferred RHP Zack Kelly from the 15-day injured list to the 60-day injured list. Right elbow inflammation.
2023-04-13
Boston Red Sox placed RHP Zack Kelly on the 15-day injured list. Right elbow inflammation.
2022-09-05
Boston Red Sox activated RHP Zack Kelly from the paternity list.
2022-09-02
Boston Red Sox placed RHP Zack Kelly on the paternity list.
2022-08-29
Boston Red Sox selected the contract of RHP Zack Kelly from Worcester Red Sox.
2021-12-21
Boston Red Sox invited non-roster RHP Zack Kelly to spring training.
2021-12-21
RHP Zack Kelly roster status changed by Boston Red Sox.
2021-01-04
Boston Red Sox signed free agent RHP Zack Kelly to a minor league contract.
2019-02-25
RHP Zack Kelly assigned to Los Angeles Angels.
2018-04-27
Los Angeles Angels signed free agent RHP Zack Kelly to a minor league contract.
2017-06-16
Oakland Athletics signed free agent RHP Zack Kelly to a minor league contract.
Scouting Report
Statcast-style percentiles • Basenerd theme
Season 2025
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Basic Line
Season / Game
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Statcast Game Log
Per-game pitch metrics from Statcast
| Date | Pitches | Velo | BNStuff+ | BNCtrl+ | Whiff% | Zone% | Chase% | K% | BB% | xwOBA |
|---|---|---|---|---|---|---|---|---|---|---|
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