
Isaac Mattson
Pittsburgh Pirates (AAA)P
Age: 31
Bats/Throws: R/R
6'2" / 214
DOB: 7/14/1995
(31 years, 1 month, 21 days)
P
Splits
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Standard
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Standard
| Season | Handedness | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | vs L | 18.2 | - - - | 87 | 23 | 9 | 0 | 13 | 13 | 2 | 11 | 0 | 0 | 17 | .307 | .391 | .507 | .389 |
| 2026 | vs R | 18.0 | - - - | 79 | 17 | 4 | 0 | 7 | 7 | 1 | 7 | 0 | 1 | 17 | .239 | .316 | .338 | .296 |
| Season | Home / Away | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | Home | 22.0 | 4.50 | 100 | 23 | 9 | 0 | 11 | 11 | 0 | 12 | 0 | 1 | 20 | .264 | .360 | .368 | .329 |
| 2026 | Away | 14.2 | 5.52 | 66 | 17 | 4 | 0 | 9 | 9 | 3 | 6 | 0 | 0 | 14 | .288 | .348 | .508 | .368 |
| 2026 | Home vs L | 11.0 | - - - | 52 | 13 | 7 | 0 | 8 | 8 | 0 | 8 | 0 | 0 | 10 | .295 | .404 | .455 | .380 |
| 2026 | Home vs R | 11.0 | - - - | 48 | 10 | 2 | 0 | 3 | 3 | 0 | 4 | 0 | 1 | 10 | .233 | .313 | .279 | .274 |
| 2026 | Away vs L | 7.2 | - - - | 35 | 10 | 2 | 0 | 5 | 5 | 2 | 3 | 0 | 0 | 7 | .323 | .371 | .581 | .402 |
| 2026 | Away vs R | 7.0 | - - - | 31 | 7 | 2 | 0 | 4 | 4 | 1 | 3 | 0 | 0 | 7 | .250 | .323 | .429 | .330 |
| Season | Monthly | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | Mar/Apr | 16.2 | 3.78 | 72 | 15 | 2 | 0 | 7 | 7 | 0 | 9 | 0 | 0 | 12 | .242 | .333 | .274 | .283 |
| 2026 | May | 3.0 | 6.00 | 15 | 4 | 4 | 0 | 2 | 2 | 0 | 1 | 0 | 1 | 3 | .308 | .400 | .615 | .432 |
| 2026 | Jun | 6.0 | 1.50 | 22 | 2 | 0 | 0 | 1 | 1 | 1 | 2 | 0 | 0 | 7 | .100 | .182 | .250 | .197 |
| 2026 | Jul | 9.0 | 9.00 | 47 | 17 | 6 | 0 | 9 | 9 | 2 | 4 | 0 | 0 | 11 | .395 | .447 | .674 | .478 |
| 2026 | Aug | 2.0 | 4.50 | 10 | 2 | 1 | 0 | 1 | 1 | 0 | 2 | 0 | 0 | 1 | .250 | .400 | .375 | .355 |
| 2026 | 1st Half | 30.2 | 4.40 | 134 | 30 | 8 | 0 | 15 | 15 | 3 | 14 | 0 | 1 | 26 | .254 | .336 | .398 | .326 |
| 2026 | 2nd Half | 6.0 | 7.50 | 32 | 10 | 5 | 0 | 5 | 5 | 0 | 4 | 0 | 0 | 8 | .357 | .438 | .536 | .424 |
| Season | Leverage | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | Low Leverage | 20.2 | - - - | 103 | 25 | 7 | 0 | 13 | 13 | 3 | 15 | 0 | 1 | 22 | .287 | .398 | .471 | .384 |
| 2026 | Medium Leverage | 10.2 | - - - | 44 | 11 | 4 | 0 | 5 | 5 | 0 | 3 | 0 | 0 | 9 | .268 | .318 | .366 | .304 |
| 2026 | High Leverage | 5.1 | - - - | 19 | 4 | 2 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | 3 | .222 | .211 | .333 | .227 |
| Season | Situational | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | Bases Empty | 14.2 | - - - | 72 | 18 | 6 | 0 | 1 | 1 | 1 | 10 | 0 | 0 | 16 | .290 | .389 | .435 | .367 |
| 2026 | Men on Base | 22.0 | - - - | 94 | 22 | 7 | 0 | 19 | 19 | 2 | 8 | 0 | 1 | 18 | .262 | .330 | .417 | .328 |
| 2026 | Men In Scoring | 13.1 | - - - | 60 | 13 | 5 | 0 | 15 | 15 | 0 | 7 | 0 | 1 | 14 | .255 | .350 | .353 | .318 |
| Season | Through Count | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | Through 3 - 0 | 0.1 | - - - | 10 | 1 | 0 | 0 | 1 | 1 | 0 | 8 | 0 | 1 | 0 | 1.000 | 1.000 | 1.000 | .721 |
| 2026 | Through 3 - 1 | 0.2 | - - - | 13 | 1 | 0 | 0 | 0 | 0 | 0 | 10 | 0 | 0 | 0 | .333 | .846 | .333 | .606 |
| 2026 | Through 3 - 2 | 3.1 | - - - | 19 | 2 | 0 | 0 | 0 | 0 | 0 | 8 | 0 | 0 | 5 | .182 | .526 | .182 | .388 |
| 2026 | Through 2 - 0 | 3.2 | - - - | 28 | 6 | 0 | 0 | 2 | 2 | 0 | 10 | 0 | 1 | 1 | .353 | .607 | .353 | .466 |
| 2026 | Through 1 - 0 | 13.2 | - - - | 71 | 16 | 6 | 0 | 7 | 7 | 1 | 14 | 0 | 1 | 10 | .291 | .437 | .455 | .396 |
| 2026 | Through 2 - 1 | 7.1 | - - - | 36 | 7 | 2 | 0 | 1 | 1 | 0 | 7 | 0 | 0 | 7 | .241 | .389 | .310 | .330 |
| 2026 | Through 1 - 1 | 13.0 | - - - | 61 | 16 | 4 | 0 | 7 | 7 | 0 | 8 | 0 | 0 | 17 | .302 | .393 | .377 | .350 |
| 2026 | Through 0 - 1 | 18.1 | - - - | 76 | 19 | 3 | 0 | 10 | 10 | 2 | 4 | 0 | 0 | 24 | .264 | .303 | .389 | .305 |
| 2026 | Through 2 - 2 | 11.2 | - - - | 45 | 7 | 4 | 0 | 1 | 1 | 0 | 5 | 0 | 0 | 16 | .175 | .267 | .275 | .249 |
| 2026 | Through 1 - 2 | 13.1 | - - - | 51 | 9 | 2 | 0 | 7 | 7 | 1 | 3 | 0 | 0 | 20 | .188 | .235 | .292 | .236 |
| 2026 | Through 0 - 2 | 10.1 | - - - | 35 | 4 | 1 | 0 | 5 | 5 | 1 | 0 | 0 | 0 | 16 | .114 | .114 | .229 | .146 |
| Season | SP / RP | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | As Reliever | 36.2 | 4.91 | 166 | 40 | 13 | 0 | 20 | 20 | 3 | 18 | 0 | 1 | 34 | .274 | .355 | .425 | .345 |
| Season | Shifts | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | No Shift | 8.2 | - - - | 37 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .216 | .216 | .216 | .193 |
| 2026 | Shift - All | 14.0 | - - - | 73 | 29 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .403 | .397 | .583 | .420 |
| 2026 | Shift - Traditional | 11.2 | - - - | 58 | 22 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .379 | .379 | .534 | .395 |
| 2026 | Shift - Non Traditional | 2.1 | - - - | 15 | 7 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .500 | .467 | .786 | .515 |
| Season | TTO | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | 1st Through Order as RP | 36.1 | 4.95 | 165 | 40 | 13 | 0 | 20 | 20 | 3 | 18 | 0 | 1 | 33 | .276 | .358 | .428 | .347 |
| 2026 | 2nd Through Order as RP | 0.1 | 0.00 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | .000 | .000 | .000 | .000 |
| Season | Handedness | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | vs L | 18.2 | - - - | 87 | 23 | 9 | 0 | 13 | 13 | 2 | 11 | 0 | 0 | 17 | .307 | .391 | .507 | .389 |
| 2026 | vs R | 18.0 | - - - | 79 | 17 | 4 | 0 | 7 | 7 | 1 | 7 | 0 | 1 | 17 | .239 | .316 | .338 | .296 |
| Season | Home / Away | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | Home | 22.0 | 4.50 | 100 | 23 | 9 | 0 | 11 | 11 | 0 | 12 | 0 | 1 | 20 | .264 | .360 | .368 | .329 |
| 2026 | Away | 14.2 | 5.52 | 66 | 17 | 4 | 0 | 9 | 9 | 3 | 6 | 0 | 0 | 14 | .288 | .348 | .508 | .368 |
| 2026 | Home vs L | 11.0 | - - - | 52 | 13 | 7 | 0 | 8 | 8 | 0 | 8 | 0 | 0 | 10 | .295 | .404 | .455 | .380 |
| 2026 | Home vs R | 11.0 | - - - | 48 | 10 | 2 | 0 | 3 | 3 | 0 | 4 | 0 | 1 | 10 | .233 | .313 | .279 | .274 |
| 2026 | Away vs L | 7.2 | - - - | 35 | 10 | 2 | 0 | 5 | 5 | 2 | 3 | 0 | 0 | 7 | .323 | .371 | .581 | .402 |
| 2026 | Away vs R | 7.0 | - - - | 31 | 7 | 2 | 0 | 4 | 4 | 1 | 3 | 0 | 0 | 7 | .250 | .323 | .429 | .330 |
| Season | Monthly | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | Mar/Apr | 16.2 | 3.78 | 72 | 15 | 2 | 0 | 7 | 7 | 0 | 9 | 0 | 0 | 12 | .242 | .333 | .274 | .283 |
| 2026 | May | 3.0 | 6.00 | 15 | 4 | 4 | 0 | 2 | 2 | 0 | 1 | 0 | 1 | 3 | .308 | .400 | .615 | .432 |
| 2026 | Jun | 6.0 | 1.50 | 22 | 2 | 0 | 0 | 1 | 1 | 1 | 2 | 0 | 0 | 7 | .100 | .182 | .250 | .197 |
| 2026 | Jul | 9.0 | 9.00 | 47 | 17 | 6 | 0 | 9 | 9 | 2 | 4 | 0 | 0 | 11 | .395 | .447 | .674 | .478 |
| 2026 | Aug | 2.0 | 4.50 | 10 | 2 | 1 | 0 | 1 | 1 | 0 | 2 | 0 | 0 | 1 | .250 | .400 | .375 | .355 |
| 2026 | 1st Half | 30.2 | 4.40 | 134 | 30 | 8 | 0 | 15 | 15 | 3 | 14 | 0 | 1 | 26 | .254 | .336 | .398 | .326 |
| 2026 | 2nd Half | 6.0 | 7.50 | 32 | 10 | 5 | 0 | 5 | 5 | 0 | 4 | 0 | 0 | 8 | .357 | .438 | .536 | .424 |
| Season | Leverage | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | Low Leverage | 20.2 | - - - | 103 | 25 | 7 | 0 | 13 | 13 | 3 | 15 | 0 | 1 | 22 | .287 | .398 | .471 | .384 |
| 2026 | Medium Leverage | 10.2 | - - - | 44 | 11 | 4 | 0 | 5 | 5 | 0 | 3 | 0 | 0 | 9 | .268 | .318 | .366 | .304 |
| 2026 | High Leverage | 5.1 | - - - | 19 | 4 | 2 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | 3 | .222 | .211 | .333 | .227 |
| Season | Situational | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | Bases Empty | 14.2 | - - - | 72 | 18 | 6 | 0 | 1 | 1 | 1 | 10 | 0 | 0 | 16 | .290 | .389 | .435 | .367 |
| 2026 | Men on Base | 22.0 | - - - | 94 | 22 | 7 | 0 | 19 | 19 | 2 | 8 | 0 | 1 | 18 | .262 | .330 | .417 | .328 |
| 2026 | Men In Scoring | 13.1 | - - - | 60 | 13 | 5 | 0 | 15 | 15 | 0 | 7 | 0 | 1 | 14 | .255 | .350 | .353 | .318 |
| Season | Through Count | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | Through 3 - 0 | 0.1 | - - - | 10 | 1 | 0 | 0 | 1 | 1 | 0 | 8 | 0 | 1 | 0 | 1.000 | 1.000 | 1.000 | .721 |
| 2026 | Through 3 - 1 | 0.2 | - - - | 13 | 1 | 0 | 0 | 0 | 0 | 0 | 10 | 0 | 0 | 0 | .333 | .846 | .333 | .606 |
| 2026 | Through 3 - 2 | 3.1 | - - - | 19 | 2 | 0 | 0 | 0 | 0 | 0 | 8 | 0 | 0 | 5 | .182 | .526 | .182 | .388 |
| 2026 | Through 2 - 0 | 3.2 | - - - | 28 | 6 | 0 | 0 | 2 | 2 | 0 | 10 | 0 | 1 | 1 | .353 | .607 | .353 | .466 |
| 2026 | Through 1 - 0 | 13.2 | - - - | 71 | 16 | 6 | 0 | 7 | 7 | 1 | 14 | 0 | 1 | 10 | .291 | .437 | .455 | .396 |
| 2026 | Through 2 - 1 | 7.1 | - - - | 36 | 7 | 2 | 0 | 1 | 1 | 0 | 7 | 0 | 0 | 7 | .241 | .389 | .310 | .330 |
| 2026 | Through 1 - 1 | 13.0 | - - - | 61 | 16 | 4 | 0 | 7 | 7 | 0 | 8 | 0 | 0 | 17 | .302 | .393 | .377 | .350 |
| 2026 | Through 0 - 1 | 18.1 | - - - | 76 | 19 | 3 | 0 | 10 | 10 | 2 | 4 | 0 | 0 | 24 | .264 | .303 | .389 | .305 |
| 2026 | Through 2 - 2 | 11.2 | - - - | 45 | 7 | 4 | 0 | 1 | 1 | 0 | 5 | 0 | 0 | 16 | .175 | .267 | .275 | .249 |
| 2026 | Through 1 - 2 | 13.1 | - - - | 51 | 9 | 2 | 0 | 7 | 7 | 1 | 3 | 0 | 0 | 20 | .188 | .235 | .292 | .236 |
| 2026 | Through 0 - 2 | 10.1 | - - - | 35 | 4 | 1 | 0 | 5 | 5 | 1 | 0 | 0 | 0 | 16 | .114 | .114 | .229 | .146 |
| Season | SP / RP | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | As Reliever | 36.2 | 4.91 | 166 | 40 | 13 | 0 | 20 | 20 | 3 | 18 | 0 | 1 | 34 | .274 | .355 | .425 | .345 |
| Season | Shifts | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | No Shift | 8.2 | - - - | 37 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .216 | .216 | .216 | .193 |
| 2026 | Shift - All | 14.0 | - - - | 73 | 29 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .403 | .397 | .583 | .420 |
| 2026 | Shift - Traditional | 11.2 | - - - | 58 | 22 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .379 | .379 | .534 | .395 |
| 2026 | Shift - Non Traditional | 2.1 | - - - | 15 | 7 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .500 | .467 | .786 | .515 |
| Season | TTO | IP | ERA | TBF | H | 2B | 3B | R | ER | HR | BB | IBB | HBP | SO | AVG | OBP | SLG | wOBA |
| 2026 | 1st Through Order as RP | 36.1 | 4.95 | 165 | 40 | 13 | 0 | 20 | 20 | 3 | 18 | 0 | 1 | 33 | .276 | .358 | .428 | .347 |
| 2026 | 2nd Through Order as RP | 0.1 | 0.00 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | .000 | .000 | .000 | .000 |

