Last with Tampa Bay Rays · RF · No longer on a 40-man roster
Justin Williams has an estimated 140 days of major league service time — 0.140 in the notation clubs use, from 140 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2018 | Tampa Bay Rays | 2 | 0.002 | From transactions |
| 2019 | St. Louis Cardinals | 46 | 0.048 | From transactions |
| 2020 | St. Louis Cardinals | 14 | 0.062 | From transactions |
| 2021 | St. Louis Cardinals | 78 | 0.140 | 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.