← Miami Marlins
Michael Petersen
Miami Marlins
RP · #49 · Bats R · Throws R · 6'7" · 195 lb · Age 32 · 3 yrs in MLB
2026 grade
82.7
- Runs prevented
- +8.6
- IP · ERA
- 65.2 · 3.02
- K · BB
- 81 · 29
- Rank
- 36 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.
- Strikeouts81 vs 60 avg+5.8
- Home runs allowed5 vs 8 avg+4.4
- Walks27 vs 23 avg−1.3
- Contact allowed (how it turned out counts a quarter)150 vs 173 avg−0.5
- Parks pitched in+0.4
- Hit batters4 vs 3 avg−0.3
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sun, Sep 27vsATL | W 5-3 | W | 1.1 | 0 | 0 | 0 | 1 | 0 | 0 | 26 | 70.3 |
| Wed, Sep 23@CHC | W 3-2 | B | 0.2 | 1 | 0 | 0 | 0 | 2 | 0 | 13 | 30.0 |
| Tue, Sep 22@CHC | W 8-2 | 1.0 | 1 | 0 | 0 | 1 | 1 | 0 | 18 | 41.0 | |
| Sat, Sep 19@SD | L 6-7 | 1.1 | 2 | 1 | 1 | 0 | 4 | 0 | 25 | 25.7 | |
| Tue, Sep 15@ARI | W 4-2 | 1.0 | 0 | 0 | 0 | 1 | 2 | 0 | 23 | 65.0 | |
| Mon, Sep 14@ARI | L 7-8 | H | 1.0 | 2 | 0 | 0 | 0 | 3 | 0 | 24 | 27.0 |
| Sat, Sep 12vsLAD | W 4-3 | H | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 13 | 86.7 |
| Wed, Sep 9vsNYM | L 14-15 | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 8 | 85.7 | |
| Wed, Sep 2@KC | W 9-6 | H | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 9 | 88.5 |
| Sun, Aug 30@WSH | W 6-2 | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 13 | 45.1 | |
| Sat, Aug 29@WSH | L 4-5 | L | 0.2 | 1 | 1 | 0 | 2 | 1 | 0 | 19 | 22.0 |
| Tue, Aug 25vsBOS | L 3-7 | 1.0 | 1 | 0 | 0 | 1 | 0 | 0 | 22 | 40.2 | |
| Sun, Aug 23vsWSH | W 6-2 | W | 0.1 | 0 | 0 | 0 | 1 | 1 | 0 | 12 | – |
| Sat, Aug 22vsWSH | W 4-2 | H | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 18 | 85.0 |
| Tue, Aug 18@PHI | L 4-6 | L | 1.0 | 4 | 4 | 4 | 0 | 0 | 0 | 26 | 3.9 |
| Sun, Aug 16@CIN | W 7-1 | H | 1.0 | 1 | 1 | 1 | 0 | 1 | 1 | 14 | 22.8 |
| Sat, Aug 15@CIN | W 8-4 | H | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 14 | 84.3 |
| Tue, Aug 11vsPIT | W 2-0 | H | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 | 16 | 58.6 |
| Sun, Aug 9vsLAA | W 12-3 | W | 1.0 | 0 | 0 | 0 | 1 | 2 | 0 | 15 | 65.6 |
| Fri, Aug 7vsLAA | L 3-4 | 1.1 | 0 | 0 | 0 | 2 | 2 | 0 | 26 | 60.9 | |
| Sun, Aug 2@NYM | W 2-0 | H | 1.0 | 0 | 0 | 0 | 1 | 2 | 0 | 19 | 62.9 |
| Thu, Jul 30@NYM | L 2-4 | L | 0.2 | 3 | 2 | 2 | 0 | 1 | 0 | 28 | 11.1 |
| Sun, Jul 26vsSD | L 3-5 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | – | |
| Fri, Jul 24vsSD | L 2-4 | 0.2 | 1 | 0 | 0 | 1 | 0 | 0 | 15 | 32.8 | |
| Sun, Jul 19@MIL | L 1-3 | H | 1.1 | 0 | 0 | 0 | 0 | 1 | 0 | 18 | 77.9 |
| Fri, Jul 17@MIL | L 1-2 | 1.0 | 0 | 0 | 0 | 2 | 2 | 0 | 21 | 47.8 | |
| Sun, Jul 12vsCLE | L 2-5 | 1.0 | 2 | 1 | 1 | 0 | 0 | 1 | 26 | 13.1 | |
| Wed, Jul 8vsSEA | W 2-0 | H | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 14 | 88.5 |
| Tue, Jul 7vsSEA | W 6-5 | H | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 11 | 88.5 |
| Sun, Jul 5@ATH | W 9-8 | H | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 9 | – |
| Fri, Jul 3@ATH | W 12-5 | 0.2 | 0 | 0 | 0 | 2 | 1 | 0 | 21 | 37.1 | |
| Mon, Jun 29@COL | W 10-7 | H | 1.1 | 1 | 1 | 1 | 0 | 1 | 1 | 17 | 33.0 |
| Fri, Jun 26@STL | W 4-0 | H | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 19 | 41.9 |
| Wed, Jun 24vsTEX | W 4-2 | H | 1.0 | 0 | 0 | 0 | 0 | 3 | 0 | 13 | 87.4 |
| Mon, Jun 22vsTEX | L 3-4 | 0.2 | 2 | 0 | 0 | 0 | 1 | 0 | 13 | 28.3 | |
| Sun, Jun 21vsSF | W 2-1 | H | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 16 | 87.4 |
| Fri, Jun 19vsSF | W 4-3 | 1.0 | 2 | 2 | 2 | 0 | 1 | 1 | 17 | 9.2 | |
| Wed, Jun 17@PHI | W 12-4 | 1.0 | 0 | 0 | 0 | 0 | 3 | 0 | 17 | 85.7 | |
| Sat, Jun 13@PIT | L 2-3 | 2.0 | 0 | 0 | 0 | 0 | 3 | 0 | 29 | 98.3 | |
| Thu, Jun 11vsARI | W 2-0 | H | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 14 | 61.9 |
| Tue, Jun 9vsARI | W 10-6 | 1.0 | 1 | 1 | 0 | 2 | 1 | 0 | 26 | 21.4 | |
| Sun, Jun 7vsTB | W 4-1 | H | 1.0 | 0 | 0 | 0 | 0 | 2 | 0 | 17 | 83.7 |
| Sat, Jun 6vsTB | W 4-3 | 1.0 | 1 | 1 | 1 | 1 | 2 | 0 | 26 | 20.7 | |
| Tue, Jun 2@WSH | W 7-3 | H | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 | 11 | 32.4 |
| Mon, Jun 1@WSH | W 7-3 | H | 1.0 | 0 | 0 | 0 | 1 | 1 | 0 | 16 | 63.5 |
| Fri, May 29@NYM | L 7-9 | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 9 | 71.5 | |
| Wed, May 27@TOR | L 1-2 | 0.2 | 1 | 1 | 1 | 2 | 0 | 0 | 23 | 23.4 | |
| Sun, May 24vsNYM | W 4-0 | 1.1 | 0 | 0 | 0 | 0 | 2 | 0 | 17 | 92.7 | |
| Fri, May 22vsNYM | W 2-1 | H | 0.2 | 1 | 0 | 0 | 0 | 1 | 0 | 13 | – |
| Tue, May 19vsATL | L 4-8 | 1.1 | 0 | 0 | 0 | 2 | 1 | 0 | 26 | 60.8 | |
| Fri, May 15@TB | L 2-7 | 1.1 | 0 | 0 | 0 | 0 | 1 | 0 | 14 | 73.5 | |
| Sat, May 9vsWSH | W 8-7 | 0.2 | 4 | 3 | 3 | 0 | 0 | 0 | 16 | 4.3 | |
| Thu, May 7vsBAL | W 4-3 | H | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 10 | 84.3 |
| Tue, May 5vsBAL | L 7-9 | 1.0 | 0 | 0 | 0 | 0 | 2 | 0 | 17 | 84.3 | |
| Tue, Apr 28@LAD | W 2-1 | H | 0.1 | 3 | 1 | 1 | 0 | 0 | 0 | 9 | 11.3 |
| Mon, Apr 27@LAD | L 4-5 | H | 1.1 | 0 | 0 | 0 | 1 | 2 | 0 | 26 | 69.7 |
| Wed, Apr 22vsSTL | W 4-1 | 1.0 | 0 | 0 | 0 | 0 | 3 | 0 | 13 | 83.7 | |
| Sun, Apr 19vsMIL | W 5-3 | 1.2 | 1 | 1 | 1 | 0 | 1 | 0 | 23 | 89.4 | |
| Tue, Apr 14@ATL | L 5-6 | H | 2.0 | 1 | 0 | 0 | 0 | 1 | 0 | 22 | 94.6 |
| Sat, Apr 11@DET | L 1-6 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 87.9 | |
| Wed, Apr 8vsCIN | W 7-4 | S | 1.0 | 2 | 0 | 0 | 0 | 2 | 0 | 22 | 36.4 |
| Sat, Apr 4@NYY | L 7-9 | L | 1.0 | 1 | 3 | 2 | 3 | 0 | 0 | 30 | 19.4 |
| Fri, Apr 3@NYY | L 2-8 | 1.0 | 1 | 1 | 1 | 1 | 1 | 1 | 20 | 14.9 | |
| Mon, Mar 30vsCHW | L 4-9 | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 11 | 86.0 | |
| Sun, Mar 29vsCOL | W 4-3 | W | 1.0 | 0 | 0 | 0 | 0 | 2 | 0 | 11 | 86.0 |
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.