Last with Seattle Mariners · P · No longer on a 40-man roster
Tom Wilhelmsen has an estimated 5 years and 135 days of major league service time — 5.135 in the notation clubs use, from 995 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2011 | Seattle Mariners | 103 | 0.103 | From transactions |
| 2012 | Seattle Mariners | 172 | 1.103 | Carried forward |
| 2013 | Seattle Mariners | 158 | 2.089 | From transactions |
| 2014 | Seattle Mariners | 172 | 3.089 | Carried forward |
| 2015 | Seattle Mariners | 170 | 4.087 | From transactions |
| 2016 | Seattle Mariners, Texas Rangers | 150 | 5.065 | From transactions |
| 2017 | Arizona Diamondbacks | 70 | 5.135 | 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.