Last with Washington Nationals · SS · No longer on a 40-man roster
Wilmer Difo has an estimated 4 years and 145 days of major league service time — 4.145 in the notation clubs use, from 833 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2015 | Washington Nationals | 50 | 0.050 | From transactions |
| 2016 | Washington Nationals | 59 | 0.109 | From transactions |
| 2017 | Washington Nationals | 172 | 1.109 | From transactions |
| 2018 | Washington Nationals | 172 | 2.109 | Carried forward |
| 2019 | Washington Nationals | 85 | 3.022 | From transactions |
| 2020 | Washington Nationals | 122 | 3.144 | From transactions |
| 2021 | Pittsburgh Pirates | 162 | 4.134 | From transactions |
| 2022 | Arizona Diamondbacks | 11 | 4.145 | 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.