Last with Arizona Diamondbacks · CF · No longer on a 40-man roster
Adam Eaton has an estimated 8 years and 159 days of major league service time — 8.159 in the notation clubs use, from 1535 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2012 | Arizona Diamondbacks | 30 | 0.030 | From transactions |
| 2013 | Arizona Diamondbacks | 172 | 1.030 | From transactions |
| 2014 | Chicago White Sox | 172 | 2.030 | From transactions |
| 2015 | Chicago White Sox | 172 | 3.030 | Carried forward |
| 2016 | Chicago White Sox | 172 | 4.030 | From transactions |
| 2017 | Washington Nationals | 172 | 5.030 | From transactions |
| 2018 | Washington Nationals | 172 | 6.030 | From transactions |
| 2019 | Washington Nationals | 172 | 7.030 | Carried forward |
| 2020 | Washington Nationals | 172 | 8.030 | From transactions |
| 2021 | Los Angeles Angels, Chicago White Sox | 129 | 8.159 | 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.