Last with Washington Nationals · P · No longer on a 40-man roster
Jordan Zimmermann has an estimated 12 years and 156 days of major league service time — 12.156 in the notation clubs use, from 2220 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2009 | Washington Nationals | 170 | 0.170 | From transactions |
| 2010 | Washington Nationals | 158 | 1.156 | From transactions |
| 2011 | Washington Nationals | 172 | 2.156 | Carried forward |
| 2012 | Washington Nationals | 172 | 3.156 | Carried forward |
| 2013 | Washington Nationals | 172 | 4.156 | Carried forward |
| 2014 | Washington Nationals | 172 | 5.156 | Carried forward |
| 2015 | Washington Nationals | 172 | 6.156 | From transactions |
| 2016 | Detroit Tigers | 172 | 7.156 | From transactions |
| 2017 | Detroit Tigers | 172 | 8.156 | Carried forward |
| 2018 | Detroit Tigers | 172 | 9.156 | From transactions |
| 2019 | Detroit Tigers | 172 | 10.156 | From transactions |
| 2020 | Detroit Tigers | 172 | 11.156 | From transactions |
| 2021 | Milwaukee Brewers | 172 | 12.156 | 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.