Last with Boston Red Sox · 3B · No longer on a 40-man roster
Will Middlebrooks has an estimated 4 years and 65 days of major league service time — 4.065 in the notation clubs use, from 753 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2012 | Boston Red Sox | 155 | 0.155 | From transactions |
| 2013 | Boston Red Sox | 138 | 1.121 | From transactions |
| 2014 | Boston Red Sox | 172 | 2.121 | From transactions |
| 2015 | San Diego Padres | 108 | 3.057 | From transactions |
| 2016 | Milwaukee Brewers | 149 | 4.034 | From transactions |
| 2017 | Texas Rangers | 31 | 4.065 | 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.