Seattle Mariners · P · Free agency eligible
Seranthony Domínguez has an estimated 8 years and 131 days of major league service time — 8.131 in the notation clubs use, from 1507 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2018 | Philadelphia Phillies | 148 | 0.148 | From transactions |
| 2019 | Philadelphia Phillies | 172 | 1.148 | From transactions |
| 2020 | Philadelphia Phillies | 172 | 2.148 | From transactions |
| 2021 | Philadelphia Phillies | 155 | 3.131 | From transactions |
| 2022 | Philadelphia Phillies | 172 | 4.131 | From transactions |
| 2023 | Philadelphia Phillies | 172 | 5.131 | From transactions |
| 2024 | Baltimore Orioles, Philadelphia Phillies | 172 | 6.131 | From transactions |
| 2025 | Baltimore Orioles, Toronto Blue Jays | 172 | 7.131 | From transactions |
| 2026 | Seattle Mariners, Chicago White Sox | 172 | 8.131 | From transactions |
172 days credit a full year, so a season adds at most 1.000 no matter how long a player is on a roster. 3.000 years reaches salary arbitration and 6.000 reaches free agency —
what every threshold unlocks.
This figure is an estimate reconstructed from public roster
transaction records. It is not an official MLB or MLBPA figure — those are
not published. See the
methodology.
Last updated 2026-10-12.
Independent project, not affiliated with or endorsed by Major League
Baseball or the MLBPA.