← Boston Red Sox
Tyron Guerrero
Boston Red Sox
RP · #41 · Bats R · Throws R · 6'8" · 225 lb · Age 35 · 4 yrs in MLB
2026 grade
81.2
- Runs prevented
- +8.1
- IP · ERA
- 40.2 · 3.10
- K · BB
- 41 · 8
- Rank
- 39 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.
- Home runs allowed2 vs 5 avg+4.2
- Walks7 vs 14 avg+2.3
- Strikeouts41 vs 37 avg+1.2
- Parks pitched in+0.4
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Wed, Sep 23vsCLE | W 1-0 | H | 1.0 | 0 | 0 | 0 | 1 | 3 | 0 | 22 | 65.6 |
| Sun, Sep 20@TB | L 1-5 | 1.0 | 0 | 0 | 0 | 0 | 2 | 0 | 12 | 79.1 | |
| Mon, Aug 31vsSEA | W 9-8 | B | 0.1 | 3 | 3 | 3 | 1 | 0 | 0 | 13 | 5.2 |
| Sat, Aug 29@NYY | W 6-0 | H | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 | 18 | 55.4 |
| Fri, Aug 28@NYY | L 0-1 | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 6 | 77.3 | |
| Tue, Aug 25@MIA | W 7-3 | 1.2 | 2 | 0 | 0 | 1 | 0 | 0 | 26 | 25.8 | |
| Sun, Aug 23vsSF | W 5-4 | H | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 | 11 | 46.0 |
| Wed, Aug 19vsARI | L 6-7 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 9 | 86.7 | |
| Tue, Aug 18vsARI | W 9-4 | H | 1.2 | 2 | 0 | 0 | 0 | 1 | 0 | 19 | 48.0 |
| Wed, Aug 12@TOR | L 4-6 | L | 0.0 | 3 | 5 | 4 | 2 | 0 | 0 | 20 | 5.3 |
| Tue, Aug 11@TOR | L 3-5 | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 9 | 80.5 | |
| Sun, Aug 9vsATH | L 3-4 | H | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 15 | 87.4 |
| Thu, Aug 6vsCHW | W 12-11 | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 9 | 87.4 | |
| Wed, Aug 5vsCHW | W 4-0 | H | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 7 | 87.4 |
| Sun, Aug 2@LAD | W 8-4 | H | 1.0 | 2 | 1 | 1 | 0 | 1 | 0 | 23 | 26.4 |
| Sat, Aug 1@LAD | W 3-2 | H | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 | 11 | 55.1 |
| Wed, Jul 29@ATH | W 4-2 | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 11 | 87.4 | |
| Sun, Jul 26vsTOR | W 6-1 | H | 1.0 | 1 | 0 | 0 | 1 | 0 | 0 | 16 | 40.7 |
| Fri, Jul 24vsTOR | W 6-4 | 1.1 | 0 | 0 | 0 | 0 | 1 | 0 | 13 | 94.2 | |
| Mon, Jul 20vsBAL | W 6-5 | 1.1 | 2 | 1 | 1 | 0 | 3 | 0 | 19 | 36.0 | |
| Fri, Jul 17vsTB | W 5-3 | H | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 13 | 59.8 |
| Fri, Jul 10@NYM | W 6-2 | H | 1.0 | 2 | 0 | 0 | 0 | 0 | 0 | 19 | 27.4 |
| Thu, Jul 9@CHW | W 2-1 | W | 1.2 | 2 | 0 | 0 | 0 | 1 | 0 | 19 | 60.2 |
| Sun, Jul 5@LAA | W 7-5 | H | 2.0 | 0 | 0 | 0 | 1 | 1 | 0 | 26 | 95.8 |
| Mon, Jun 29vsWSH | W 6-3 | H | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 | 15 | 59.3 |
| Sun, Jun 28vsNYY | W 5-4 | H | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 9 | – |
| Wed, Jun 24@COL | L 6-8 | H | 0.2 | 2 | 3 | 0 | 0 | 1 | 0 | 25 | 28.1 |
| Mon, Jun 22@COL | L 2-3 | H | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 90.2 |
| Sat, Jun 20@SEA | W 5-1 | 1.0 | 0 | 0 | 0 | 0 | 2 | 0 | 14 | 71.4 | |
| Wed, Jun 17vsTOR | L 0-3 | 1.2 | 1 | 0 | 0 | 0 | 3 | 0 | 18 | 68.2 | |
| Sat, Jun 13vsTEX | W 6-3 | H | 0.1 | 2 | 1 | 1 | 0 | 1 | 1 | 18 | 4.0 |
| Fri, Jun 12vsTEX | W 10-1 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 12 | 84.3 | |
| Mon, Jun 8@TB | L 1-3 | 1.1 | 1 | 0 | 0 | 0 | 2 | 0 | 16 | 67.7 | |
| Sun, Jun 7@NYY | L 1-6 | 0.2 | 0 | 0 | 0 | 0 | 1 | 0 | 10 | – | |
| Sun, May 31@CLE | W 9-4 | 0.2 | 1 | 0 | 0 | 0 | 1 | 0 | 15 | 43.2 | |
| Sat, May 30@CLE | W 9-1 | H | 0.2 | 1 | 0 | 0 | 0 | 1 | 0 | 7 | 43.1 |
| Thu, May 28vsATL | L 2-10 | 0.1 | 1 | 0 | 0 | 0 | 0 | 0 | 8 | – | |
| Tue, May 26vsATL | L 6-7 | 2.0 | 2 | 2 | 2 | 0 | 4 | 1 | 36 | 30.8 | |
| Sun, May 24vsMIN | L 5-6 | L | 0.2 | 2 | 2 | 2 | 0 | 2 | 0 | 14 | 27.7 |
| Fri, May 22vsMIN | L 6-8 | 1.0 | 0 | 0 | 0 | 1 | 1 | 0 | 16 | 64.5 |
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.