Detroit Tigers · P · Free agency eligible
Jack Flaherty has an estimated 9 years and 6 days of major league service time — 9.006 in the notation clubs use, from 1554 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2017 | St. Louis Cardinals | 31 | 0.031 | From transactions |
| 2018 | St. Louis Cardinals | 147 | 1.006 | From transactions |
| 2019 | St. Louis Cardinals | 172 | 2.006 | From transactions |
| 2020 | St. Louis Cardinals | 172 | 3.006 | Carried forward |
| 2021 | St. Louis Cardinals | 172 | 4.006 | From transactions |
| 2022 | St. Louis Cardinals | 172 | 5.006 | From transactions |
| 2023 | Baltimore Orioles, St. Louis Cardinals | 172 | 6.006 | From transactions |
| 2024 | Detroit Tigers, Los Angeles Dodgers | 172 | 7.006 | From transactions |
| 2025 | Detroit Tigers | 172 | 8.006 | From transactions |
| 2026 | Detroit Tigers | 172 | 9.006 | 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.