Last with Washington Nationals · 3B · No longer on a 40-man roster
Carter Kieboom has an estimated 2 years and 167 days of major league service time — 2.167 in the notation clubs use, from 511 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2019 | Washington Nationals | 11 | 0.011 | From transactions |
| 2020 | Washington Nationals | 158 | 0.169 | From transactions |
| 2021 | Washington Nationals | 75 | 1.072 | From transactions |
| 2022 | Washington Nationals | 172 | 2.072 | From transactions |
| 2023 | Washington Nationals | 82 | 2.154 | From transactions |
| 2024 | Washington Nationals, Los Angeles Angels | 0 | 2.154 | From transactions |
| 2025 | Los Angeles Angels | 13 | 2.167 | 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.