Last with Baltimore Orioles · P · No longer on a 40-man roster
Zack Britton has an estimated 10 years and 161 days of major league service time — 10.161 in the notation clubs use, from 1881 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2011 | Baltimore Orioles | 158 | 0.158 | From transactions |
| 2012 | Baltimore Orioles | 135 | 1.121 | From transactions |
| 2013 | Baltimore Orioles | 40 | 1.161 | From transactions |
| 2014 | Baltimore Orioles | 172 | 2.161 | Carried forward |
| 2015 | Baltimore Orioles | 172 | 3.161 | Carried forward |
| 2016 | Baltimore Orioles | 172 | 4.161 | Carried forward |
| 2017 | Baltimore Orioles | 172 | 5.161 | From transactions |
| 2018 | Baltimore Orioles, New York Yankees | 172 | 6.161 | From transactions |
| 2019 | New York Yankees | 172 | 7.161 | From transactions |
| 2020 | New York Yankees | 172 | 8.161 | From transactions |
| 2021 | New York Yankees | 172 | 9.161 | From transactions |
| 2022 | New York Yankees | 172 | 10.161 | 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.