Last with Seattle Mariners · P · No longer on a 40-man roster
Taijuan Walker has an estimated 12 years and 3 days of major league service time — 12.003 in the notation clubs use, from 2067 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2013 | Seattle Mariners | 32 | 0.032 | From transactions |
| 2014 | Seattle Mariners | 118 | 0.150 | From transactions |
| 2015 | Seattle Mariners | 172 | 1.150 | Carried forward |
| 2016 | Seattle Mariners | 168 | 2.146 | From transactions |
| 2017 | Arizona Diamondbacks | 172 | 3.146 | From transactions |
| 2018 | Arizona Diamondbacks | 172 | 4.146 | From transactions |
| 2019 | Arizona Diamondbacks | 172 | 5.146 | From transactions |
| 2020 | Seattle Mariners, Toronto Blue Jays | 172 | 6.146 | From transactions |
| 2021 | New York Mets | 172 | 7.146 | From transactions |
| 2022 | New York Mets | 172 | 8.146 | From transactions |
| 2023 | Philadelphia Phillies | 172 | 9.146 | Carried forward |
| 2024 | Philadelphia Phillies | 172 | 10.146 | From transactions |
| 2025 | Philadelphia Phillies | 172 | 11.146 | From transactions |
| 2026 | Philadelphia Phillies | 29 | 12.003 | 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.