Research
New here?How to read this page
▶
How to read this page
A player page shows one box score, because a hitter and a pitcher share almost no column — which half you get follows the one he appears in. Every rate is built from summed counts, so a batting average is hits over at bats across whatever window you picked rather than an average of nightly averages. Pitchers rank against starters or relievers, which is the split the sport itself draws. A dash means no number for that cell, or a zero in a roster column that counts.
Isaac Mattson
Pitcher2026 · Regular Season
One to noteIn wins, Isaac Mattson is 257th of 282 relief pitchers, at 0.
94th beats 94% of the Relief Pitchers; 1 is the best of however many the row says. Higher is always better, whichever way the stat runs. Red to green by where the placing sits. A stat with no better end is left unpainted.
Cardsall 4 shown▶
Playing TimeDefensevs Relief Pitchers▶
ResultsDefensevs Relief Pitchers▶
CommandDefensevs Relief Pitchers▶
ReliefDefensevs Relief Pitchers▶
Game log38 games
| Date | Opp | IP | W | L | SV | H | HR | K | BB | ERA | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 5, 2026 |  LAA | 2 | 0 | 0 | 0 | 4 | 0 | 2 | 0 | 13.50 | 2.00 |
| Aug 17, 2026 |  DET | 2 | 0 | 0 | 0 | 2 | 0 | 1 | 2 | 4.50 | 2.00 |
| July 28, 2026 |  ARI | 1.2 | 0 | 0 | 0 | 3 | 0 | 3 | 1 | 5.40 | 2.40 |
| July 25, 2026 |  CHC | 0.1 | 0 | 0 | 0 | 4 | 0 | 1 | 1 | 81.00 | 15.00 |
| July 19, 2026 | @ CLE | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| July 18, 2026 | @CLE | 1 | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 0.00 | 1.00 |
| July 12, 2026 |  MIL | 0.2 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0.00 | 3.00 |
| July 11, 2026 | MIL | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0.00 | 1.00 |
| July 8, 2026 |  ATL | 1 | 0 | 0 | 0 | 2 | 0 | 1 | 0 | 9.00 | 2.00 |
| July 5, 2026 | @ WSH | 1 | 0 | 0 | 0 | 2 | 0 | 1 | 0 | 0.00 | 2.00 |
| July 3, 2026 | @WSH | 1 | 0 | 0 | 0 | 3 | 2 | 1 | 1 | 36.00 | 4.00 |
| June 30, 2026 | @ PHI | 0.2 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0.00 | 1.50 |
| June 27, 2026 |  CIN | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0.00 | 0.00 |
| June 26, 2026 | CIN | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| June 23, 2026 |  SEA | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| June 17, 2026 | @ ATH | 1 | 0 | 0 | 0 | 1 | 1 | 2 | 0 | 9.00 | 1.00 |
| June 14, 2026 |  MIA | 1.1 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0.00 | 1.50 |
| May 17, 2026 | PHI | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0.00 | 1.00 |
| May 16, 2026 | PHI | 1.1 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 0.00 | 0.75 |
| May 10, 2026 | @ SF | 0.1 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 54.00 | 9.00 |
| May 7, 2026 | @ARI | 0.1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| April 30, 2026 |  STL | 0.2 | 0 | 0 | 0 | 3 | 0 | 0 | 2 | 67.50 | 7.50 |
| April 27, 2026 | STL | 0.1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| April 25, 2026 | @MIL | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0.00 |
| April 24, 2026 | @MIL | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0.00 | 1.00 |
| April 19, 2026 |  TB | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| April 18, 2026 | TB | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0.00 |
| April 16, 2026 | WSH | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0.00 | 1.00 |
| April 14, 2026 | WSH | 2 | 0 | 0 | 0 | 2 | 0 | 1 | 0 | 0.00 | 1.00 |
| April 11, 2026 | @CHC | 1 | 0 | 0 | 0 | 2 | 0 | 1 | 0 | 0.00 | 2.00 |
| April 10, 2026 | @CHC | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0.00 | 1.00 |
| April 7, 2026 |  SD | 0.2 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0.00 | 1.50 |
| April 6, 2026 | SD | 1 | 0 | 0 | 0 | 2 | 0 | 2 | 0 | 0.00 | 2.00 |
| April 4, 2026 |  BAL | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0.00 | 2.00 |
| April 1, 2026 | @CIN | 1.1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0.75 |
| March 30, 2026 | @CIN | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0.00 | 1.00 |
| March 29, 2026 | @ NYM | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0.00 | 0.00 |
| March 26, 2026 | @NYM | 0.2 | 0 | 0 | 0 | 3 | 0 | 1 | 2 | 27.00 | 7.50 |
| Season | G | GS | IP | W | L | SV | ERA | WHIP | H | HR | K | BB |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 38 | 0 | 38.1 | 0 | 0 | 0 | 5.40 | 1.62 | 44 | 3 | 36 | 18 |
| 2025 | 44 | 0 | 47.2 | 3 | 3 | 0 | 2.45 | 1.13 | 35 | 4 | 45 | 19 |
| 2024 | 3 | 0 | 5.1 | 0 | 0 | 0 | 5.06 | 1.13 | 1 | 0 | 6 | 5 |
About MLB Research
▶
Every number the site holds for a Major League team and the players who played for it, in one place. Pick a club, a season and a set of games, and read it. Nothing here needs an account.
Where the numbers come from
The same tables the boards read, resolved through one shared definition per stat. A rate is computed over the whole window rather than averaged across games, so a season figure is not the mean of the nightly ones.