Last with Detroit Tigers · P · No longer on a 40-man roster
Justin Miller has an estimated 4 years and 20 days of major league service time — 4.020 in the notation clubs use, from 708 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2014 | Detroit Tigers | 30 | 0.030 | From transactions |
| 2015 | Colorado Rockies | 72 | 0.102 | From transactions |
| 2016 | Colorado Rockies | 172 | 1.102 | From transactions |
| 2017 | Colorado Rockies | 0 | 1.102 | Carried forward |
| 2018 | Washington Nationals | 130 | 2.060 | From transactions |
| 2019 | Washington Nationals | 132 | 3.020 | From transactions |
| 2020 | Cincinnati Reds | 0 | 3.020 | From transactions |
| 2021 | Washington Nationals, St. Louis Cardinals | 172 | 4.020 | 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.