← Boston Red Sox
Greg Weissert
Boston Red Sox
RP · #57 · Bats R · Throws R · 6'2" · 235 lb · Age 31 · 5 yrs in MLB
2026 grade
54.4
- Runs prevented
- +2.4
- IP · ERA
- 60.2 · 3.26
- K · BB
- 60 · 20
- Rank
- 94 of 205 relievers
What the grade is made of
Runs each part saves or costs against an average pitcher facing the same batters. Contact counts a quarter for how it turned out, because over a season that's mostly the fielders and luck.
- Walks18 vs 22 avg+1.2
- Strikeouts60 vs 56 avg+1.0
- Parks pitched in+0.4
- Home runs allowed8 vs 8 avg−0.4
- Contact allowed (how it turned out counts a quarter)163 vs 163 avg+0.2
2026 game log: pitching
Game grades need 3 batters faced; starts are ranked against starts, relief outings against relief outings.
| Game | Result | Dec | IP | H | R | ER | BB | K | HR | PC | Grade |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Tue, Sep 29@NYYPostseason | L 0-9 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 15 | 77.6 | |
| Fri, Sep 25vsCHC | W 4-3 | W | 1.1 | 0 | 0 | 0 | 2 | 1 | 0 | 22 | 60.5 |
| Fri, Sep 18@TB | W 4-2 | H | 2.0 | 1 | 0 | 0 | 0 | 1 | 0 | 27 | 89.2 |
| Wed, Sep 16@TEX | L 3-7 | 1.1 | 1 | 0 | 0 | 0 | 1 | 0 | 15 | 67.6 | |
| Sun, Sep 13vsKC | W 4-1 | H | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 11 | 87.4 |
| Fri, Sep 11vsKC | L 2-3 | 0.2 | 3 | 0 | 0 | 0 | 0 | 0 | 18 | 8.0 | |
| Tue, Sep 8vsLAA | L 1-6 | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 | 16 | 43.5 | |
| Sat, Sep 5@BAL | W 5-0 | 0.2 | 0 | 0 | 0 | 1 | 1 | 0 | 13 | 49.9 | |
| Tue, Sep 1vsSEA | L 6-9 | 1.0 | 1 | 0 | 0 | 1 | 1 | 0 | 19 | 40.6 | |
| Sun, Aug 30@NYY | L 1-16 | 0.2 | 1 | 0 | 0 | 0 | 1 | 0 | 15 | 43.9 | |
| Fri, Aug 28@NYY | L 0-1 | 0.2 | 0 | 0 | 0 | 0 | 1 | 0 | 5 | – | |
| Tue, Aug 25@MIA | W 7-3 | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 12 | 58.3 | |
| Sat, Aug 22vsSF | W 3-2 | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 | 19 | 58.8 | |
| Wed, Aug 19vsARI | L 6-7 | 1.0 | 2 | 2 | 2 | 1 | 1 | 1 | 31 | 5.9 | |
| Mon, Aug 17vsARI | W 11-1 | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 13 | 43.9 | |
| Thu, Aug 13@TOR | W 7-0 | 1.0 | 0 | 0 | 0 | 1 | 1 | 0 | 17 | 64.5 | |
| Thu, Aug 6vsCHW | W 12-11 | 1.0 | 2 | 1 | 1 | 1 | 3 | 0 | 34 | 18.3 | |
| Tue, Aug 4vsCHW | W 14-2 | 0.2 | 0 | 0 | 0 | 1 | 0 | 0 | 14 | 51.5 | |
| Sun, Aug 2@LAD | W 8-4 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | – | |
| Thu, Jul 30@ATH | W 5-4 | H | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 10 | 46.1 |
| Wed, Jul 29@ATH | W 4-2 | S | 1.0 | 0 | 0 | 0 | 0 | 2 | 0 | 15 | 87.4 |
| Sun, Jul 26vsTOR | W 6-1 | W | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 12 | 59.8 |
| Fri, Jul 24vsTOR | W 6-4 | 1.0 | 2 | 3 | 3 | 0 | 1 | 1 | 20 | 8.1 | |
| Sun, Jul 19vsTB | W 6-1 | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 12 | 44.2 | |
| Fri, Jul 17vsTB | W 5-3 | W | 0.2 | 2 | 0 | 0 | 0 | 0 | 0 | 7 | 28.4 |
| Sat, Jul 11@NYM | W 4-0 | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 | 12 | 55.7 | |
| Fri, Jul 10@NYM | W 6-2 | 1.0 | 1 | 1 | 1 | 0 | 0 | 1 | 11 | 21.9 | |
| Wed, Jul 8@CHW | W 5-0 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 10 | 77.9 | |
| Sun, Jul 5@LAA | W 7-5 | W | 1.1 | 0 | 0 | 0 | 0 | 2 | 0 | 18 | 93.6 |
| Sat, Jul 4@LAA | W 8-1 | 1.0 | 0 | 0 | 0 | 1 | 0 | 0 | 12 | 50.9 | |
| Tue, Jun 30vsWSH | L 1-8 | L | 1.2 | 1 | 2 | 2 | 1 | 1 | 0 | 28 | 67.0 |
| Thu, Jun 25vsNYY | W 6-3 | H | 0.2 | 1 | 1 | 1 | 1 | 0 | 0 | 21 | 32.6 |
| Fri, Jun 19@SEA | W 6-2 | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 10 | 71.4 | |
| Wed, Jun 17vsTOR | L 0-3 | 1.0 | 2 | 1 | 1 | 0 | 1 | 0 | 20 | 36.6 | |
| Tue, Jun 16vsTOR | L 1-6 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 85.7 | |
| Sun, Jun 14vsTEX | L 4-6 | 1.1 | 1 | 0 | 0 | 0 | 1 | 0 | 15 | 55.8 | |
| Wed, Jun 10@TB | L 5-7 | 0.1 | 0 | 0 | 0 | 0 | 1 | 0 | 3 | – | |
| Mon, Jun 8@TB | L 1-3 | 0.1 | 1 | 0 | 0 | 1 | 1 | 0 | 17 | 24.1 | |
| Tue, Jun 2vsBAL | L 2-4 | 1.2 | 0 | 0 | 0 | 0 | 3 | 0 | 25 | 96.7 | |
| Sun, May 31@CLE | W 9-4 | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 19 | 54.4 | |
| Thu, May 28vsATL | L 2-10 | 1.0 | 1 | 2 | 2 | 1 | 0 | 1 | 17 | 15.1 | |
| Tue, May 26vsATL | L 6-7 | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 14 | 57.1 | |
| Sun, May 24vsMIN | L 5-6 | 1.0 | 1 | 0 | 0 | 1 | 1 | 0 | 19 | 30.6 | |
| Fri, May 22vsMIN | L 6-8 | 1.1 | 1 | 0 | 0 | 0 | 0 | 0 | 23 | 38.3 | |
| Wed, May 20@KC | W 4-3 | H | 1.1 | 1 | 0 | 0 | 0 | 1 | 0 | 21 | 68.4 |
| Fri, May 15@ATL | L 2-3 | 1.1 | 0 | 0 | 0 | 0 | 0 | 0 | 13 | 92.0 | |
| Sun, May 10vsTB | L 1-4 | 0.2 | 0 | 0 | 0 | 1 | 0 | 0 | 10 | 50.9 | |
| Thu, May 7vsTB | L 4-8 | 0.0 | 2 | 1 | 1 | 1 | 0 | 0 | 11 | 10.2 | |
| Wed, May 6@DET | W 4-0 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 84.3 | |
| Sun, May 3vsHOU | L 1-3 | 1.1 | 3 | 1 | 1 | 0 | 1 | 0 | 22 | 15.8 | |
| Wed, Apr 29@TOR | L 1-8 | 0.2 | 2 | 2 | 2 | 0 | 1 | 1 | 13 | 9.1 | |
| Mon, Apr 27@TOR | W 5-0 | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 | 10 | 42.0 | |
| Sat, Apr 25@BAL | W 17-1 | 1.0 | 2 | 1 | 0 | 0 | 1 | 0 | 21 | 35.1 | |
| Thu, Apr 23vsNYY | L 2-4 | B | 0.1 | 2 | 0 | 0 | 1 | 1 | 0 | 12 | 20.2 |
| Mon, Apr 20vsDET | W 8-6 | 1.0 | 0 | 0 | 0 | 0 | 3 | 0 | 10 | 81.8 | |
| Sat, Apr 18vsDET | L 1-4 | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 | 12 | 57.1 | |
| Sat, Apr 11@STL | W 7-1 | H | 0.2 | 0 | 0 | 0 | 1 | 0 | 0 | 16 | 50.3 |
| Fri, Apr 10@STL | L 2-3 | 1.1 | 0 | 0 | 0 | 0 | 1 | 0 | 18 | 92.7 | |
| Wed, Apr 8vsMIL | W 5-0 | H | 0.2 | 1 | 0 | 0 | 0 | 2 | 0 | 11 | 46.0 |
| Sun, Apr 5vsSD | L 6-8 | 1.0 | 2 | 2 | 2 | 0 | 3 | 1 | 18 | 13.0 | |
| Fri, Apr 3vsSD | W 5-2 | H | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 17 | 87.1 |
| Wed, Apr 1@HOU | L 4-6 | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 16 | 79.8 | |
| Sun, Mar 29@CIN | L 2-3 | L | 0.2 | 1 | 2 | 2 | 1 | 1 | 1 | 15 | 11.1 |
| Sat, Mar 28@CIN | L 5-6 | 1.0 | 2 | 1 | 1 | 1 | 2 | 1 | 27 | 8.4 |
Scores, box scores and play-by-play from ESPN. The run values and park factors behind the grades were worked out from Retrosheet's play-by-play: the information used here was obtained free of charge from and is copyrighted by Retrosheet. Interested parties may contact Retrosheet at www.retrosheet.org.