Boston Red Sox · DH · Arbitration eligible
Jahmai Jones has an estimated 3 years and 141 days of major league service time — 3.141 in the notation clubs use, from 657 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2020 | Los Angeles Angels | 11 | 0.011 | From transactions |
| 2021 | Baltimore Orioles | 37 | 0.048 | From transactions |
| 2022 | Baltimore Orioles, Los Angeles Dodgers | 75 | 0.123 | From transactions |
| 2023 | Milwaukee Brewers | 116 | 1.067 | From transactions |
| 2024 | New York Yankees | 131 | 2.026 | From transactions |
| 2025 | Detroit Tigers | 115 | 2.141 | From transactions |
| 2026 | Boston Red Sox, Detroit Tigers | 172 | 3.141 | 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.