Last with Miami Marlins · P · No longer on a 40-man roster
John King has an estimated 5 years and 124 days of major league service time — 5.124 in the notation clubs use, from 984 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2020 | Texas Rangers | 67 | 0.067 | From transactions |
| 2021 | Texas Rangers | 172 | 1.067 | From transactions |
| 2022 | Texas Rangers | 130 | 2.025 | From transactions |
| 2023 | St. Louis Cardinals, Texas Rangers | 120 | 2.145 | From transactions |
| 2024 | St. Louis Cardinals | 172 | 3.145 | From transactions |
| 2025 | St. Louis Cardinals | 172 | 4.145 | From transactions |
| 2026 | Miami Marlins | 151 | 5.124 | 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.