Height
6'2"
Weight
214 lbs
Age
30
College
N/A
Draft
2017, Rd 19, #565
Experience
3 yrs
Bats/Throws
R/R
Fan Verdict
Grade this player:
Career StatsB+
| Year | Team | GP | ERA | W-L | K | WHIP | IP | SV |
|---|---|---|---|---|---|---|---|---|
| Career |  | 55 | 3.0815217 | 3-3 | 58 | 1.2554348 | 0.0 | 0 |
Current Contract
Length
1 year
AAV
$780K/yr
Contract Value Index (CVI)
The Pirates struck gold with this Isaac Mattson signing, landing an above-average reliever for just $0.8M on a one-year deal that earns an A CVI. This is exactly the type of shrewd, low-risk acquisition that rebuilding teams should be making — securing proven bullpen depth at a fraction of what similar arms command on the open market. Mattson brings legitimate strikeout upside and should slot comfortably into Pittsburgh's middle relief corps, providing 60-70 quality innings while their young pitching prospects continue developing in the minors. The one-year structure gives the Pirates maximum flexibility to either retain him if he performs well or flip him as a trade asset if a contender comes calling mid-season. For a franchise still in evaluation mode, getting above-average production at replacement-level salary represents exceptional value that strengthens their bullpen without hampering future payroll flexibility. This signing exemplifies smart organizational building — the Pirates identified an undervalued veteran who can contribute immediately while maintaining their long-term competitive timeline.
Performance Analysis
Isaac Mattson grades as an All-Star caliber performer among MLB relief pitchers, earning a B+ Performance grade. He carries a 2.98 ERA (below the league average of 4.20, a strong mark) and a 1.22 WHIP across 57.1 innings pitched with a 8.5 K/9 rate. His 3-3 record provides context on team support and run prevention. A 8.5 K/9 rate indicates above-average swing-and-miss stuff. As a prime-age veteran at 30, Isaac is a key contributor for the Pirates.
Recent Games
| Date | OPP | Result | AB | H | R | HR | RBI | BB | SO |
|---|---|---|---|---|---|---|---|---|---|
| Fri, 4/10 | @ CHC | W 2-0 | - | - | - | 0 | - | - | - |
| Tue, 4/7 | vs SD | W 7-1 | - | - | - | 0 | - | - | - |
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