Last with Chicago Cubs · SS · No longer on a 40-man roster
Starlin Castro has an estimated 11 years and 133 days of major league service time — 11.133 in the notation clubs use, from 2025 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2010 | Chicago Cubs | 150 | 0.150 | From transactions |
| 2011 | Chicago Cubs | 172 | 1.150 | Carried forward |
| 2012 | Chicago Cubs | 172 | 2.150 | Carried forward |
| 2013 | Chicago Cubs | 172 | 3.150 | Carried forward |
| 2014 | Chicago Cubs | 172 | 4.150 | From transactions |
| 2015 | Chicago Cubs | 172 | 5.150 | From transactions |
| 2016 | New York Yankees | 172 | 6.150 | Carried forward |
| 2017 | New York Yankees | 172 | 7.150 | From transactions |
| 2018 | Miami Marlins | 172 | 8.150 | Carried forward |
| 2019 | Miami Marlins | 172 | 9.150 | From transactions |
| 2020 | Washington Nationals | 172 | 10.150 | From transactions |
| 2021 | Washington Nationals | 155 | 11.133 | 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.