Last with Seattle Mariners · P · No longer on a 40-man roster
James Paxton has an estimated 10 years and 152 days of major league service time — 10.152 in the notation clubs use, from 1872 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2013 | Seattle Mariners | 28 | 0.028 | From transactions |
| 2014 | Seattle Mariners | 172 | 1.028 | From transactions |
| 2015 | Seattle Mariners | 172 | 2.028 | From transactions |
| 2016 | Seattle Mariners | 124 | 2.152 | From transactions |
| 2017 | Seattle Mariners | 172 | 3.152 | From transactions |
| 2018 | Seattle Mariners | 172 | 4.152 | From transactions |
| 2019 | New York Yankees | 172 | 5.152 | From transactions |
| 2020 | New York Yankees | 172 | 6.152 | From transactions |
| 2021 | Seattle Mariners | 172 | 7.152 | From transactions |
| 2022 | Boston Red Sox | 172 | 8.152 | From transactions |
| 2023 | Boston Red Sox | 172 | 9.152 | From transactions |
| 2024 | Boston Red Sox, Los Angeles Dodgers | 172 | 10.152 | 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.