Last with Minnesota Twins · C · No longer on a 40-man roster
Alex Jackson has an estimated 3 years and 147 days of major league service time — 3.147 in the notation clubs use, from 663 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2019 | Atlanta Braves | 38 | 0.038 | From transactions |
| 2020 | Atlanta Braves | 31 | 0.069 | From transactions |
| 2021 | Atlanta Braves, Miami Marlins | 172 | 1.069 | From transactions |
| 2022 | Milwaukee Brewers | 90 | 1.159 | From transactions |
| 2023 | Tampa Bay Rays | 0 | 1.159 | From transactions |
| 2024 | Tampa Bay Rays | 125 | 2.112 | From transactions |
| 2025 | Baltimore Orioles | 85 | 3.025 | From transactions |
| 2026 | Minnesota Twins | 122 | 3.147 | 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.