Last with Arizona Diamondbacks · P · No longer on a 40-man roster
Zack Littell has an estimated 6 years and 165 days of major league service time — 6.165 in the notation clubs use, from 1197 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2018 | Minnesota Twins | 32 | 0.032 | From transactions |
| 2019 | Minnesota Twins | 87 | 0.119 | From transactions |
| 2020 | Minnesota Twins | 122 | 1.069 | From transactions |
| 2021 | San Francisco Giants | 172 | 2.069 | From transactions |
| 2022 | San Francisco Giants | 146 | 3.043 | From transactions |
| 2023 | Boston Red Sox, Tampa Bay Rays | 148 | 4.019 | From transactions |
| 2024 | Tampa Bay Rays | 172 | 5.019 | From transactions |
| 2025 | Cincinnati Reds, Tampa Bay Rays | 172 | 6.019 | From transactions |
| 2026 | Arizona Diamondbacks, Washington Nationals | 146 | 6.165 | 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.