Seattle Mariners · P · Arbitration eligible
Michael Rucker has an estimated 3 years and 49 days of major league service time — 3.049 in the notation clubs use, from 565 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2021 | Chicago Cubs | 66 | 0.066 | From transactions |
| 2022 | Chicago Cubs | 137 | 1.031 | From transactions |
| 2023 | Chicago Cubs | 122 | 1.153 | From transactions |
| 2024 | Chicago Cubs, Philadelphia Phillies, Washington Nationals | 131 | 2.112 | From transactions |
| 2025 | Chicago Cubs, Philadelphia Phillies, Washington Nationals | 0 | 2.112 | Carried forward |
| 2026 | Seattle Mariners | 109 | 3.049 | 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.