Last with Florida Marlins · C · No longer on a 40-man roster
Brett Hayes has an estimated 4 years and 18 days of major league service time — 4.018 in the notation clubs use, from 706 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2009 | Miami Marlins | 47 | 0.047 | From transactions |
| 2010 | Miami Marlins | 144 | 1.019 | From transactions |
| 2011 | Miami Marlins | 172 | 2.019 | Carried forward |
| 2012 | Miami Marlins | 138 | 2.157 | From transactions |
| 2013 | Kansas City Royals | 37 | 3.022 | From transactions |
| 2014 | Kansas City Royals | 128 | 3.150 | From transactions |
| 2015 | Cleveland Indians | 40 | 4.018 | 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.