Last with Cincinnati Reds · 1B · No longer on a 40-man roster
Yonder Alonso has an estimated 8 years and 95 days of major league service time — 8.095 in the notation clubs use, from 1471 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2010 | Cincinnati Reds | 33 | 0.033 | From transactions |
| 2011 | Cincinnati Reds | 65 | 0.098 | From transactions |
| 2012 | San Diego Padres | 172 | 1.098 | Carried forward |
| 2013 | San Diego Padres | 172 | 2.098 | From transactions |
| 2014 | San Diego Padres | 172 | 3.098 | From transactions |
| 2015 | San Diego Padres | 172 | 4.098 | From transactions |
| 2016 | Oakland Athletics | 172 | 5.098 | Carried forward |
| 2017 | Oakland Athletics, Seattle Mariners | 172 | 6.098 | From transactions |
| 2018 | Cleveland Indians | 172 | 7.098 | From transactions |
| 2019 | Colorado Rockies, Chicago White Sox | 169 | 8.095 | 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.