Isaac Mattson
Isaac Mattson is a 31-year-old relief pitcher for the Seattle Mariners. He is a movement relief pitcher, ranked 3131st in the league at the role.
About these ratings
Tool ratings combine recorded performance with statistical estimates. Speed, arm, and fielding include outcome-based estimates rather than direct physical measurements.
Limited MLB evidence: 70.2% MLB and 29.8% level-adjusted minor-league estimate.
Minor-league estimate: 33.6% observed statistical weight and 66.4% historical peer baseline; individual tools use their own sample weights.
* On NTV, this indicates estimated or unverified inputs. CE uses an asterisk only when current contract information is unavailable.
CE uses the best available contract information, including partial terms, estimated salaries, and projected team control. CE shows an asterisk only when current contract information is unavailable; free agents without a current agreement use 100*.
2026 win contribution
0.59 Player Wins · 0.78 expected from replacement · -0.18 wins above replacement
Includes contributions to every team played for in 2026. Perf expresses wins above replacement on a scale where 100 is average. How the win totals reconcile
Six-tool graphs show percentiles from available performance evidence. Speed uses baserunning outcomes; Arm uses position-adjusted throwing outcomes. Movement describes tracked pitch movement within pitch type. Minor-league comparisons account for competition level; unavailable measurements display MD.
Edge Profile
Edge combines Perf, Stick, and Carry to show how valuable a player is right now. With a Perf of 84, Stick of 86, and Carry of 90, Isaac Mattson sits in the 32nd percentile, 21st percentile, and 44th percentile in those areas. His 70 Edge lands in the 22nd percentile and ranks 400th among relief pitchers.
Stick Profile
Stick looks beyond the immediate results and estimates what should hold over a larger sample. Isaac Mattson's 86 Stick suggests he is performing close to the level supported by his underlying profile. It also places him in the 21st percentile and ranks 548th among relief pitchers.
Perf Profile
Perf measures season wins above replacement after allocating each team's actual wins to its players. It includes Isaac Mattson's contributions to every team he played for. His 84 Perf is below average on a scale where 100 is average and 20 points is one standard deviation. It sits in the 32nd percentile and ranks 351st among relief pitchers.
Carry Profile
Carry places Perf in the context of the roster around a player and includes a bounded clutch adjustment for offense, pitching, and defense when available. Close games and later innings earn more weight, and difficult defensive plays receive their own credit. His clutch runs are offense +0.0, pitching +1.1, defense +0.1. The strongest rated teammates are Randy Arozarena at 142, Bryan Woo at 130, and Cole Young at 109. Isaac Mattson has contributed about as much as his own Perf suggests, resulting in a Carry of 90.
LI Profile
LI looks at how much useful baseball a player may still have ahead of him. At age 31, Isaac Mattson carries a 97 LI, which points to a steady near-term outlook without a major longevity advantage. That places him in the 3rd percentile and ranks 3208th among relief pitchers.
CE Profile
CE compares expected production with the money and years attached to a contract. The model uses a one season control horizon, $0.8 million average annual value, and about $0.8 million in contract-scenario costs for Isaac Mattson. Options and arbitration can make those years or costs conditional; manual contract inputs may lag new agreements. His 100 CE is close to a fair exchange between salary and production, placing him in the 11th percentile and 3024th among relief pitchers.
NTV Profile
NTV estimates Isaac Mattson's value on a neutral trade market before the needs of a specific club are considered. His 0* NTV reflects his present ability, expected future value, age, contract, control, positional demand, and risk. That mark sits in the 9th percentile and ranks 3131st among relief pitchers. Isaac Mattson sits near neutral value, where salary relief and roster fit may matter as much as the player return.