Last with San Diego Padres · P · No longer on a 40-man roster
Jay Jackson has an estimated 3 years and 152 days of major league service time — 3.152 in the notation clubs use, from 668 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2015 | San Diego Padres | 21 | 0.021 | From transactions |
| 2016 | San Diego Padres | 0 | 0.021 | Carried forward |
| 2017 | San Diego Padres | 0 | 0.021 | Carried forward |
| 2018 | San Diego Padres | 0 | 0.021 | Carried forward |
| 2019 | Milwaukee Brewers | 68 | 0.089 | From transactions |
| 2020 | Cincinnati Reds | 172 | 1.089 | From transactions |
| 2021 | San Francisco Giants | 165 | 2.082 | From transactions |
| 2022 | Atlanta Braves | 96 | 3.006 | From transactions |
| 2023 | Toronto Blue Jays | 77 | 3.083 | From transactions |
| 2024 | Minnesota Twins | 69 | 3.152 | 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.