Greg Weissert | Boston Red Sox
MLB Player
Greg Weissert
Boston Red SoxHeight6' 2"Weight235 lbsAge31Experience5th Season
1SVTied-137th
3.71ERA
54KTied-264th
1.26WHIP
Player Information
PositionRelief Pitcher
Jersey#57
Date of Birth4/2/1995
BirthplaceBay Shore, NY
Experience5th Season
Bats / ThrowsRight/Right
MLB Debut2022
StatusActive
Next Game
More Boston Red Sox Players
Season, Postseason & Career
| Split | GP | GS | CG | SHO | IP | H | R | ER | HR | BB | K |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Regular Season | 57 | 0 | 0 | 0 | 53.1 | 49 | 23 | 22 | 8 | 18 | 54 |
| Projected | 64 | 0 | 0 | 0 | 59.0 | 55 | 26 | 25 | 9 | 20 | 60 |
| Career | 220 | 0 | 0 | 0 | 215.0 | 198 | 98 | 81 | 25 | 72 | 202 |
Pitching by Season
| Season | GP | GS | W | L | W% | WAR | ERA | WHIP | IP | K | BB | K/BB | H | R | ER | SV | HLD | BLSV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | 12 | 0 | 3 | 0 | 1.000 | -0.3 | 5.56 | 0.97 | 11.1 | 11 | 5 | 2.2 | 6 | 7 | 7 | 0 | 2 | 0 |
| 2023 | 17 | 0 | 0 | 0 | .000 | 0.2 | 4.05 | 1.45 | 20.0 | 22 | 8 | 2.8 | 21 | 9 | 9 | 0 | 2 | 0 |
| 2024 | 62 | 0 | 4 | 2 | .667 | 0.6 | 3.13 | 1.34 | 63.1 | 58 | 20 | 2.9 | 65 | 32 | 22 | 1 | 6 | 4 |
| 2025 | 72 | 0 | 6 | 6 | .500 | 1.1 | 2.82 | 1.16 | 67.0 | 57 | 21 | 2.7 | 57 | 27 | 21 | 4 | 17 | 9 |
| 2026 | 57 | 0 | 3 | 2 | .600 | 0.3 | 3.71 | 1.26 | 53.1 | 54 | 18 | 3.0 | 49 | 23 | 22 | 1 | 6 | 2 |
| Career | 220 | 0 | 16 | 10 | .615 | -- | 3.39 | 1.26 | 215.0 | 202 | 72 | 2.8 | 198 | 98 | 81 | 6 | 33 | 15 |
Postseason Pitching by Season
| Season | GP | GS | W | L | W% | WAR | ERA | WHIP | IP | K | BB | K/BB | H | R | ER | SV | HLD | BLSV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 1 | 0 | 0 | 0 | .000 | 0.0 | 0.00 | 0.00 | 1.0 | 0 | 0 | 0.0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Career | 1 | 0 | 0 | 0 | .000 | 0.0 | 0.00 | 0.00 | 1.0 | 0 | 0 | 0.0 | 0 | 0 | 0 | 0 | 0 | 0 |
Opponent Batting by Season
| Season | P | TBF | P-TBF | OBA | OOBP | OSLUG | OOPS | 2B | 3B | HR | TB | RBI | BH | SH | SF | IBB |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | 186 | 48 | 3.875 | .146 | .271 | .244 | .515 | 1 | 0 | 1 | 10 | 5 | 2 | 0 | 0 | 0 |
| 2023 | 347 | 87 | 3.989 | .273 | .349 | .416 | .764 | 2 | 0 | 3 | 32 | 9 | 1 | 1 | 0 | 0 |
| 2024 | 1029 | 263 | 3.913 | .274 | .324 | .401 | .725 | 9 | 0 | 7 | 95 | 41 | 0 | 1 | 5 | 4 |
| 2025 | 1069 | 278 | 3.845 | .227 | .292 | .355 | .647 | 14 | 0 | 6 | 89 | 31 | 3 | 1 | 2 | 1 |
| 2026 | 882 | 225 | 3.920 | .243 | .308 | .396 | .704 | 7 | 0 | 8 | 80 | 34 | 2 | 0 | 2 | 1 |
| Career | 3513 | 901 | 3.899 | .245 | .310 | .379 | .689 | 33 | 0 | 25 | 306 | 120 | 8 | 3 | 9 | 6 |
Expanded Pitching by Season
| Season | P/S | P/I | K/9 | QS | CG | SHO | GSC | GB | FB | G/F | IR | IRS | WP | BK | SB | CS | RSUP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | 0.0 | 16.4 | 8.7 | 0 | 0 | 0 | 0.0 | 12 | 18 | 0.7 | 8 | 2 | 0 | 1 | 2 | 0 | 0.0 |
| 2023 | 0.0 | 17.4 | 9.9 | 0 | 0 | 0 | 0.0 | 28 | 28 | 1.0 | 12 | 0 | 1 | 1 | 5 | 1 | 0.0 |
| 2024 | 0.0 | 16.2 | 8.2 | 0 | 0 | 0 | 0.0 | 76 | 109 | 0.7 | 36 | 14 | 2 | 0 | 5 | 4 | 0.0 |
| 2025 | 0.0 | 16.0 | 7.7 | 0 | 0 | 0 | 0.0 | 82 | 115 | 0.7 | 28 | 7 | 1 | 0 | 6 | 3 | 0.0 |
| 2026 | 0.0 | 16.5 | 9.1 | 0 | 0 | 0 | 0.0 | 65 | 85 | 0.8 | 36 | 14 | 0 | 0 | 3 | 2 | 0.0 |
| Career | 0.0 | 16.3 | 8.5 | 0 | 0 | 0 | 0.0 | 263 | 355 | 0.7 | 120 | 37 | 4 | 2 | 21 | 10 | 0.0 |
Game Log
| Game | Result | IP | H | R | ER | HR | BB | K | GB | FB | P | TBF | GSC | Dec | Rel | ERA |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 @ BAL2026 Regular Season | W 5-0 | 0.2 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 13 | 3 | 0.0 | - | - | 3.71 |
 vs SEA2026 Regular Season | L 9-6 | 1.0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 2 | 19 | 5 | 0.0 | - | - | 3.76 |
 @ NYY2026 Regular Season | L 16-1 | 0.2 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 15 | 3 | 0.0 | - | - | 3.83 |
| @ NYY2026 Regular Season | L 1-0 | 0.2 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 5 | 2 | 0.0 | - | - | 3.88 |
 @ MIA2026 Regular Season | W 7-3 F/11 | 1.0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 12 | 4 | 0.0 | - | - | 3.93 |
 vs SF2026 Regular Season | W 3-2 | 1.0 | 1 | 0 | 0 | 0 | 0 | 2 | 1 | 1 | 19 | 4 | 0.0 | - | - | 4.01 |
 vs ARI2026 Regular Season | L 7-6 F/10 | 1.0 | 2 | 2 | 2 | 1 | 1 | 1 | 0 | 3 | 31 | 5 | 0.0 | - | - | 4.10 |
| vs ARI2026 Regular Season | W 11-1 | 1.0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 13 | 4 | 0.0 | - | - | 3.80 |
 @ TOR2026 Regular Season | W 7-0 | 1.0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 0 | 17 | 4 | 0.0 | - | - | 3.88 |
 vs CHW2026 Regular Season | W 12-11 F/13 | 1.0 | 2 | 1 | 1 | 0 | 1 | 3 | 2 | 0 | 34 | 6 | 0.0 | - | - | 3.97 |
| vs CHW2026 Regular Season | W 14-2 | 0.2 | 0 | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 14 | 3 | 0.0 | - | - | 3.86 |
 @ LAD2026 Regular Season | W 8-4 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 5 | 1 | 0.0 | - | - | 3.92 |
 @ ATH2026 Regular Season | W 5-4 | 1.0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 10 | 3 | 0.0 | - | HLD(6) | 3.95 |
| @ ATH2026 Regular Season | W 4-2 F/10 | 1.0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 1 | 15 | 3 | 0.0 | - | SV(1) | 4.04 |
| vs TOR2026 Regular Season | W 6-1 | 1.0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 12 | 4 | 0.0 | W(3-2) | - | 4.14 |
| vs TOR2026 Regular Season | W 6-4 | 1.0 | 2 | 3 | 3 | 1 | 0 | 1 | 1 | 3 | 20 | 6 | 0.0 | - | - | 4.24 |
 vs TB2026 Regular Season | W 6-1 | 1.0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 12 | 4 | 0.0 | - | - | 3.66 |
| vs TB2026 Regular Season | W 5-3 | 0.2 | 2 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 7 | 4 | 0.0 | W(2-2) | - | 3.76 |
 @ NYM2026 Regular Season | W 4-0 | 1.0 | 1 | 0 | 0 | 0 | 0 | 2 | 1 | 1 | 12 | 4 | 0.0 | - | - | 3.82 |
| @ NYM2026 Regular Season | W 6-2 | 1.0 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 3 | 11 | 4 | 0.0 | - | - | 3.93 |
| @ CHW2026 Regular SeasonWeek 27 | W 5-0 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 10 | 3 | 0.0 | - | - | 3.79 |
 @ LAA2026 Regular SeasonWeek 27 | W 7-5 | 1.1 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 1 | 18 | 4 | 0.0 | W(1-2) | - | 3.89 |
| @ LAA2026 Regular SeasonWeek 27 | W 8-1 | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 12 | 3 | 0.0 | - | - | 4.05 |
 vs WSH2026 Regular SeasonWeek 26 | L 8-1 | 1.2 | 1 | 2 | 2 | 0 | 1 | 1 | 1 | 4 | 28 | 7 | 0.0 | L(0-2) | - | 4.18 |
| vs NYY2026 Regular SeasonWeek 26 | W 6-3 | 0.2 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 2 | 21 | 4 | 0.0 | - | HLD(5) | 3.82 |
| @ SEA2026 Regular SeasonWeek 25 | W 6-2 | 1.0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 10 | 3 | 0.0 | - | - | 3.60 |
| vs TOR2026 Regular SeasonWeek 24 | L 3-0 | 1.0 | 2 | 1 | 1 | 0 | 0 | 1 | 1 | 3 | 20 | 5 | 0.0 | - | - | 3.72 |
| vs TOR2026 Regular SeasonWeek 24 | L 6-1 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 11 | 3 | 0.0 | - | - | 3.54 |
 vs TEX2026 Regular SeasonWeek 24 | L 6-4 | 1.1 | 1 | 0 | 0 | 0 | 0 | 1 | 2 | 2 | 15 | 5 | 0.0 | - | - | 3.67 |
| @ TB2026 Regular SeasonWeek 23 | L 7-5 | 0.1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 3 | 1 | 0.0 | - | - | 3.86 |
| @ TB2026 Regular SeasonWeek 23 | L 3-1 | 0.1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 17 | 3 | 0.0 | - | - | 3.91 |
| vs BAL2026 Regular SeasonWeek 22 | L 4-2 | 1.2 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 2 | 25 | 5 | 0.0 | - | - | 3.96 |
 @ CLE2026 Regular SeasonWeek 22 | W 9-4 | 1.0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 19 | 4 | 0.0 | - | - | 4.24 |
 vs ATL2026 Regular SeasonWeek 22 | L 10-2 | 1.0 | 1 | 2 | 2 | 1 | 1 | 0 | 0 | 4 | 17 | 5 | 0.0 | - | - | 4.43 |
| vs ATL2026 Regular SeasonWeek 21 | L 7-6 | 1.0 | 1 | 0 | 0 | 0 | 0 | 1 | 2 | 1 | 14 | 4 | 0.0 | - | - | 3.80 |
 vs MIN2026 Regular SeasonWeek 21 | L 6-5 | 1.0 | 1 | 0 | 0 | 0 | 1 | 1 | 2 | 1 | 19 | 5 | 0.0 | - | - | 3.98 |
| vs MIN2026 Regular SeasonWeek 21 | L 8-6 | 1.1 | 1 | 0 | 0 | 0 | 0 | 0 | 3 | 1 | 23 | 5 | 0.0 | - | - | 4.19 |
 @ KC2026 Regular SeasonWeek 20 | W 4-3 | 1.1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 3 | 21 | 5 | 0.0 | - | HLD(4) | 4.50 |
| @ ATL2026 Regular SeasonWeek 20 | L 3-2 F/10 | 1.1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 13 | 4 | 0.0 | - | - | 4.86 |
| vs TB2026 Regular SeasonWeek 19 | L 4-1 | 0.2 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 10 | 3 | 0.0 | - | - | 5.28 |
| vs TB2026 Regular SeasonWeek 19 | L 8-4 | 0.0 | 2 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 11 | 3 | 0.0 | - | - | 5.52 |
 @ DET2026 Regular SeasonWeek 18 | W 4-0 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 11 | 3 | 0.0 | - | - | 4.91 |
 vs HOU2026 Regular SeasonWeek 18 | L 3-1 F/10 | 1.1 | 3 | 1 | 1 | 0 | 0 | 1 | 1 | 4 | 22 | 6 | 0.0 | - | - | 5.27 |
| @ TOR2026 Regular SeasonWeek 17 | L 8-1 | 0.2 | 2 | 2 | 2 | 1 | 0 | 1 | 1 | 2 | 13 | 4 | 0.0 | - | - | 5.11 |
| @ TOR2026 Regular SeasonWeek 17 | W 5-0 | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 10 | 4 | 0.0 | - | - | 3.86 |
| @ BAL2026 Regular SeasonWeek 17 | W 17-1 | 1.0 | 2 | 1 | 0 | 0 | 0 | 1 | 2 | 2 | 21 | 5 | 0.0 | - | - | 4.22 |
| vs NYY2026 Regular SeasonWeek 17 | L 4-2 | 0.1 | 2 | 0 | 0 | 0 | 1 | 1 | 0 | 2 | 12 | 4 | 0.0 | - | BLSV(2) | 4.66 |
| vs DET2026 Regular SeasonWeek 16 | W 8-6 | 1.0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 10 | 3 | 0.0 | - | - | 4.82 |
| vs DET2026 Regular SeasonWeek 16 | L 4-1 | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 12 | 4 | 0.0 | - | - | 5.40 |
 @ STL2026 Regular SeasonWeek 15 | W 7-1 | 0.2 | 0 | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 16 | 4 | 0.0 | - | HLD(3) | 6.14 |
| @ STL2026 Regular SeasonWeek 15 | L 3-2 | 1.1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 18 | 4 | 0.0 | - | - | 6.75 |
 vs MIL2026 Regular SeasonWeek 14 | W 5-0 | 0.2 | 1 | 0 | 0 | 0 | 0 | 2 | 1 | 0 | 11 | 3 | 0.0 | - | HLD(2) | 8.44 |
 vs SD2026 Regular SeasonWeek 14 | L 8-6 | 1.0 | 2 | 2 | 2 | 1 | 0 | 3 | 0 | 2 | 18 | 5 | 0.0 | - | - | 9.64 |
| vs SD2026 Regular SeasonWeek 14 | W 5-2 | 1.0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 17 | 3 | 0.0 | - | HLD(1) | 7.36 |
| @ HOU2026 Regular SeasonWeek 13 | L 6-4 | 1.0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 16 | 3 | 0.0 | - | - | 10.13 |
 @ CIN2026 Regular SeasonWeek 13 | L 3-2 | 0.2 | 1 | 2 | 2 | 1 | 1 | 1 | 0 | 2 | 15 | 4 | 0.0 | L(0-1) | BLSV(1) | 16.20 |
| @ CIN2026 Regular SeasonWeek 13 | L 6-5 F/11 | 1.0 | 2 | 1 | 1 | 1 | 1 | 2 | 0 | 3 | 27 | 6 | 0.0 | - | - | 9.00 |