Last with Washington Nationals · P · No longer on a 40-man roster
Ross Detwiler has an estimated 12 years and 43 days of major league service time — 12.043 in the notation clubs use, from 2107 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2007 | Washington Nationals | 25 | 0.025 | From transactions |
| 2008 | Washington Nationals | 0 | 0.025 | Carried forward |
| 2009 | Washington Nationals | 128 | 0.153 | From transactions |
| 2010 | Washington Nationals | 149 | 1.130 | From transactions |
| 2011 | Washington Nationals | 86 | 2.044 | From transactions |
| 2012 | Washington Nationals | 172 | 3.044 | Carried forward |
| 2013 | Washington Nationals | 172 | 4.044 | From transactions |
| 2014 | Washington Nationals | 172 | 5.044 | From transactions |
| 2015 | Texas Rangers, Atlanta Braves | 172 | 6.044 | From transactions |
| 2016 | Cleveland Indians, Oakland Athletics | 80 | 6.124 | From transactions |
| 2017 | Oakland Athletics, Chicago Cubs | 172 | 7.124 | From transactions |
| 2018 | Seattle Mariners | 146 | 8.098 | From transactions |
| 2019 | Chicago White Sox | 144 | 9.070 | From transactions |
| 2020 | Chicago White Sox | 172 | 10.070 | From transactions |
| 2021 | San Diego Padres, Miami Marlins | 172 | 11.070 | From transactions |
| 2022 | Cincinnati Reds | 145 | 12.043 | 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.