Last with Kansas City Royals · 3B · No longer on a 40-man roster
Emmanuel Rivera has an estimated 3 years and 91 days of major league service time — 3.091 in the notation clubs use, from 607 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2021 | Kansas City Royals | 73 | 0.073 | From transactions |
| 2022 | Arizona Diamondbacks, Kansas City Royals | 155 | 1.056 | From transactions |
| 2023 | Arizona Diamondbacks | 141 | 2.025 | From transactions |
| 2024 | Baltimore Orioles, Miami Marlins | 172 | 3.025 | From transactions |
| 2025 | Baltimore Orioles | 66 | 3.091 | 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.