Last with Boston Red Sox · RF · No longer on a 40-man roster
Rusney Castillo has an estimated 141 days of major league service time — 0.141 in the notation clubs use, from 141 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2014 | Boston Red Sox | 12 | 0.012 | From transactions |
| 2015 | Boston Red Sox | 102 | 0.114 | From transactions |
| 2016 | Boston Red Sox | 27 | 0.141 | 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.