Last with Seattle Mariners · 1B · No longer on a 40-man roster
Justin Smoak has an estimated 10 years and 58 days of major league service time — 10.058 in the notation clubs use, from 1778 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2010 | Seattle Mariners, Texas Rangers | 115 | 0.115 | From transactions |
| 2011 | Seattle Mariners | 172 | 1.115 | From transactions |
| 2012 | Seattle Mariners | 169 | 2.112 | From transactions |
| 2013 | Seattle Mariners | 172 | 3.112 | From transactions |
| 2014 | Seattle Mariners | 143 | 4.083 | From transactions |
| 2015 | Toronto Blue Jays | 172 | 5.083 | From transactions |
| 2016 | Toronto Blue Jays | 172 | 6.083 | From transactions |
| 2017 | Toronto Blue Jays | 172 | 7.083 | Carried forward |
| 2018 | Toronto Blue Jays | 172 | 8.083 | From transactions |
| 2019 | Toronto Blue Jays | 172 | 9.083 | From transactions |
| 2020 | San Francisco Giants, Milwaukee Brewers | 147 | 10.058 | 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.