Last with Toronto Blue Jays · RF · No longer on a 40-man roster
Darin Mastroianni has an estimated 2 years and 68 days of major league service time — 2.068 in the notation clubs use, from 412 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2011 | Toronto Blue Jays | 1 | 0.001 | From transactions |
| 2012 | Minnesota Twins | 147 | 0.148 | From transactions |
| 2013 | Minnesota Twins | 169 | 1.145 | From transactions |
| 2014 | Toronto Blue Jays, Minnesota Twins | 36 | 2.009 | From transactions |
| 2015 | Philadelphia Phillies, Minnesota Twins | 0 | 2.009 | From transactions |
| 2016 | Minnesota Twins | 59 | 2.068 | 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.