Medica was designated for assignment by the Marlins on Wednesday, Joe Frisaro of MLB.com reports.
Medica joined the Marlins in September after being designated for assignment by the Padres in September, but will now go through the waiver process again following the team's signing of Chris Johnson on Wednesday. If he clears, the 27-year-old would no longer be part of the 40-man roster, and would likely be slated to begin the season in the minors.