Kansas City Royals · P · Free agency eligible
Michael Wacha has an estimated 13 years and 62 days of major league service time — 13.062 in the notation clubs use, from 2298 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2013 | St. Louis Cardinals | 62 | 0.062 | From transactions |
| 2014 | St. Louis Cardinals | 172 | 1.062 | From transactions |
| 2015 | St. Louis Cardinals | 172 | 2.062 | Carried forward |
| 2016 | St. Louis Cardinals | 172 | 3.062 | From transactions |
| 2017 | St. Louis Cardinals | 172 | 4.062 | Carried forward |
| 2018 | St. Louis Cardinals | 172 | 5.062 | From transactions |
| 2019 | St. Louis Cardinals | 172 | 6.062 | From transactions |
| 2020 | New York Mets | 172 | 7.062 | From transactions |
| 2021 | Tampa Bay Rays | 172 | 8.062 | From transactions |
| 2022 | Boston Red Sox | 172 | 9.062 | From transactions |
| 2023 | San Diego Padres | 172 | 10.062 | From transactions |
| 2024 | Kansas City Royals | 172 | 11.062 | From transactions |
| 2025 | Kansas City Royals | 172 | 12.062 | From transactions |
| 2026 | Kansas City Royals | 172 | 13.062 | 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.