Isaac Mattson is a Pittsburgh Pirates RP projected for 44 fantasy points on 38.7 IP, 36 K, 5.3 ERA, 1.602 WHIP by the managr projection engine. Monte-Carlo outcome odds put an elite season at 0% and a bust at 12%.
Projection snapshot: 2026-09-28. Rebuilt daily.
Isaac Mattson's 2026 projection is built on 39 innings out of the bullpen.
Across 2 seasons with meaningful innings, Mattson's biggest strikeout year came in 2025 at age 29: 45 strikeouts over 48 innings, with 3 wins. Innings across 2025 and 2026 ran 48 and 39.
Tracking data from 2026: Mattson struck out 20.5% of batters and walked 10.2%, a strikeout-minus-walk rate of 10.3 points, and hitters missed on 21.0% of their swings. Contact against Mattson averaged 92.1 mph off the bat, with a 12.4% barrel rate.
Mattson's projected range runs from a 44-point floor to a 70-point upside, around a 44-point median: a spread of 26 points, or 59% of the median.
By statistical profile, the closest comparisons to Mattson on the board are Carlos Vargas, Drey Jameson and Max Kranick.
At 30, Mattson is in the age range where pitchers typically hold their skills, and the multi-year valuation applies little age adjustment.
This report is generated from the managr engine's 2026-09-28 snapshot and rebuilt daily.
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