Last with New York Mets · P · No longer on a 40-man roster
Rafael Montero has an estimated 9 years and 97 days of major league service time — 9.097 in the notation clubs use, from 1645 days credited on a major league roster.
| Season | Club | Days | Running total | How this season is known |
|---|---|---|---|---|
| 2014 | New York Mets | 51 | 0.051 | From transactions |
| 2015 | New York Mets | 172 | 1.051 | From transactions |
| 2016 | New York Mets | 38 | 1.089 | From transactions |
| 2017 | New York Mets | 149 | 2.066 | From transactions |
| 2018 | New York Mets | 172 | 3.066 | From transactions |
| 2019 | Texas Rangers | 70 | 3.136 | From transactions |
| 2020 | Texas Rangers | 172 | 4.136 | From transactions |
| 2021 | Houston Astros, Seattle Mariners | 172 | 5.136 | From transactions |
| 2022 | Houston Astros | 172 | 6.136 | From transactions |
| 2023 | Houston Astros | 172 | 7.136 | Carried forward |
| 2024 | Houston Astros | 133 | 8.097 | From transactions |
| 2025 | Detroit Tigers, Houston Astros, Atlanta Braves | 172 | 9.097 | 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.