Isaac Mattson
Seattle MarinersP
Age: 31
Bats/Throws: R/R
6'2" / 214
DOB: 7/14/1995
(31 years, 3 months, 26 days)
P
| Season | 2026 | 2027 | Total |
| Team | PIT | FGDC | - - - |
| Level | MLB | PROJ | MLB |
| G | 38 | 30 | 89 |
| GS | 0 | 0 | 0 |
| IP | 38.2 | 30.0 | 96.0 |
| K% | 20.5% | 23.5% | 21.4% |
| BB% | 10.2% | 9.9% | 11.2% |
| GB% | 27.1% | 28.6% | |
| ERA | 5.35 | 3.96 | 3.94 |
| FIP | 3.72 | 4.20 | 3.79 |
| WAR | 0.3 | 0.0 | 1.0 |
2026 Pitch
Selection
Selection
FA:70%
SL:19%
CH:10%
RosterResource
| How Acquired: | Waivers (PIT) Nov'26 |
| Draft: | 2017, Rd: 19, Pick: 10, Ovr: 565 |
| Draft Team: | Los Angeles Angels |
| Signing Bonus: | $100,000 |
| School: | Pittsburgh |
| Contract | 1 yr, $792.4k (2026) (RR) |
Pre-Arbitration | AAV: $792k |
Service Time
0.161MiLB Options
1
Free Agent
2032
Arb Eligible
2028
News
Rotowire: The Mariners claimed Mattson off waivers from the Pirates on Monday, Colin Beazley of the Pittsburgh Post-Gazette reports. (11/2/2026)
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