Last with Tampa Bay Rays · CF · No longer on a 40-man roster
Desmond Jennings has an estimated 5 years and 74 days of major league service time — 5.074 in the notation clubs use, from 934 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2010 | Tampa Bay Rays | 33 | 0.033 | From transactions |
| 2011 | Tampa Bay Rays | 68 | 0.101 | From transactions |
| 2012 | Tampa Bay Rays | 172 | 1.101 | From transactions |
| 2013 | Tampa Bay Rays | 172 | 2.101 | From transactions |
| 2014 | Tampa Bay Rays | 172 | 3.101 | From transactions |
| 2015 | Tampa Bay Rays | 172 | 4.101 | From transactions |
| 2016 | Tampa Bay Rays | 145 | 5.074 | 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.