Last with St. Louis Cardinals · P · No longer on a 40-man roster
Joe Kelly has an estimated 12 years and 27 days of major league service time — 12.027 in the notation clubs use, from 2091 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2012 | St. Louis Cardinals | 116 | 0.116 | From transactions |
| 2013 | St. Louis Cardinals | 172 | 1.116 | Carried forward |
| 2014 | Boston Red Sox, St. Louis Cardinals | 172 | 2.116 | From transactions |
| 2015 | Boston Red Sox | 156 | 3.100 | From transactions |
| 2016 | Boston Red Sox | 99 | 4.027 | From transactions |
| 2017 | Boston Red Sox | 172 | 5.027 | From transactions |
| 2018 | Boston Red Sox | 172 | 6.027 | From transactions |
| 2019 | Los Angeles Dodgers | 172 | 7.027 | From transactions |
| 2020 | Los Angeles Dodgers | 172 | 8.027 | From transactions |
| 2021 | Los Angeles Dodgers | 172 | 9.027 | From transactions |
| 2022 | Chicago White Sox | 172 | 10.027 | From transactions |
| 2023 | Los Angeles Dodgers, Chicago White Sox | 172 | 11.027 | From transactions |
| 2024 | Los Angeles Dodgers | 172 | 12.027 | 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.