Last with Seattle Mariners · P · No longer on a 40-man roster
Dominic Leone has an estimated 8 years and 168 days of major league service time — 8.168 in the notation clubs use, from 1544 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2014 | Seattle Mariners | 172 | 1.000 | From transactions |
| 2015 | Arizona Diamondbacks, Seattle Mariners | 39 | 1.039 | From transactions |
| 2016 | Arizona Diamondbacks | 82 | 1.121 | From transactions |
| 2017 | Toronto Blue Jays | 165 | 2.114 | From transactions |
| 2018 | St. Louis Cardinals | 172 | 3.114 | From transactions |
| 2019 | St. Louis Cardinals | 123 | 4.065 | From transactions |
| 2020 | Cleveland Indians | 139 | 5.032 | From transactions |
| 2021 | San Francisco Giants | 172 | 6.032 | From transactions |
| 2022 | San Francisco Giants | 156 | 7.016 | From transactions |
| 2023 | Los Angeles Angels, New York Mets, Seattle Mariners | 152 | 7.168 | From transactions |
| 2024 | Chicago White Sox | 172 | 8.168 | 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.