Last with Seattle Mariners · P · No longer on a 40-man roster
Shawn Kelley has an estimated 10 years and 128 days of major league service time — 10.128 in the notation clubs use, from 1848 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2009 | Seattle Mariners | 172 | 1.000 | From transactions |
| 2010 | Seattle Mariners | 172 | 2.000 | From transactions |
| 2011 | Seattle Mariners | 160 | 2.160 | From transactions |
| 2012 | Seattle Mariners | 140 | 3.128 | From transactions |
| 2013 | New York Yankees | 172 | 4.128 | From transactions |
| 2014 | New York Yankees | 172 | 5.128 | From transactions |
| 2015 | San Diego Padres | 172 | 6.128 | From transactions |
| 2016 | Washington Nationals | 172 | 7.128 | Carried forward |
| 2017 | Washington Nationals | 172 | 8.128 | From transactions |
| 2018 | Washington Nationals, Oakland Athletics | 172 | 9.128 | From transactions |
| 2019 | Texas Rangers | 172 | 10.128 | 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.