Last with Kansas City Royals · P · No longer on a 40-man roster
Aaron Brooks has an estimated 2 years and 148 days of major league service time — 2.148 in the notation clubs use, from 492 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2014 | Kansas City Royals | 7 | 0.007 | From transactions |
| 2015 | Kansas City Royals, Oakland Athletics | 60 | 0.067 | From transactions |
| 2016 | Chicago Cubs | 172 | 1.067 | From transactions |
| 2017 | Chicago Cubs, Milwaukee Brewers | 0 | 1.067 | From transactions |
| 2018 | Oakland Athletics | 30 | 1.097 | From transactions |
| 2019 | Baltimore Orioles, Oakland Athletics | 172 | 2.097 | From transactions |
| 2020 | Baltimore Orioles, Oakland Athletics | 0 | 2.097 | Carried forward |
| 2021 | Baltimore Orioles, Oakland Athletics | 0 | 2.097 | Carried forward |
| 2022 | St. Louis Cardinals | 25 | 2.122 | From transactions |
| 2023 | St. Louis Cardinals | 0 | 2.122 | Carried forward |
| 2024 | Oakland Athletics | 20 | 2.142 | From transactions |
| 2025 | Oakland Athletics | 0 | 2.142 | From transactions |
| 2026 | Tampa Bay Rays | 6 | 2.148 | 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.