Last with Houston Astros · 1B · No longer on a 40-man roster
Jon Singleton has an estimated 2 years and 78 days of major league service time — 2.078 in the notation clubs use, from 422 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2014 | Houston Astros | 118 | 0.118 | From transactions |
| 2015 | Houston Astros | 47 | 0.165 | From transactions |
| 2016 | Houston Astros | 0 | 0.165 | From transactions |
| 2017 | Houston Astros | 0 | 0.165 | From transactions |
| 2018 | Houston Astros | 0 | 0.165 | Carried forward |
| 2019 | Houston Astros | 0 | 0.165 | Carried forward |
| 2020 | Houston Astros | 0 | 0.165 | Carried forward |
| 2021 | Milwaukee Brewers | 0 | 0.165 | From transactions |
| 2022 | Milwaukee Brewers | 0 | 0.165 | From transactions |
| 2023 | Houston Astros, Milwaukee Brewers | 70 | 1.063 | From transactions |
| 2024 | Houston Astros | 172 | 2.063 | Carried forward |
| 2025 | Houston Astros | 15 | 2.078 | 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.