Last with San Francisco Giants · 3B · No longer on a 40-man roster
Matt Duffy has an estimated 9 years and 129 days of major league service time — 9.129 in the notation clubs use, from 1677 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2014 | San Francisco Giants | 129 | 0.129 | From transactions |
| 2015 | San Francisco Giants | 172 | 1.129 | From transactions |
| 2016 | San Francisco Giants, Tampa Bay Rays | 172 | 2.129 | From transactions |
| 2017 | Tampa Bay Rays | 172 | 3.129 | From transactions |
| 2018 | Tampa Bay Rays | 172 | 4.129 | From transactions |
| 2019 | Tampa Bay Rays | 172 | 5.129 | From transactions |
| 2020 | Texas Rangers, New York Yankees, Chicago Cubs | 0 | 5.129 | From transactions |
| 2021 | Chicago Cubs | 172 | 6.129 | From transactions |
| 2022 | Los Angeles Angels | 172 | 7.129 | From transactions |
| 2023 | Kansas City Royals | 172 | 8.129 | From transactions |
| 2024 | Texas Rangers | 172 | 9.129 | 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.