Last with Houston Astros · LF · No longer on a 40-man roster
Tony Kemp has an estimated 6 years and 120 days of major league service time — 6.120 in the notation clubs use, from 1152 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2016 | Houston Astros | 97 | 0.097 | From transactions |
| 2017 | Houston Astros | 35 | 0.132 | From transactions |
| 2018 | Houston Astros | 139 | 1.099 | From transactions |
| 2019 | Chicago Cubs, Houston Astros | 172 | 2.099 | From transactions |
| 2020 | Oakland Athletics | 172 | 3.099 | From transactions |
| 2021 | Oakland Athletics | 172 | 4.099 | From transactions |
| 2022 | Oakland Athletics | 172 | 5.099 | Carried forward |
| 2023 | Oakland Athletics | 172 | 6.099 | From transactions |
| 2024 | Baltimore Orioles | 21 | 6.120 | 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.