It seems that Alfredo Amezaga isn't exactly good to go, yet.

Thursday, President of Baseball Operations Larry Beinfest said Amezaga has yet to begin a running program, but his rehab is going fine since undergoing microfracture knee surgery. Amezaga, who made $1.3 million last season and is eligible for arbitration again, missed all but 27 games in 2009 because of the knee injury he sustained while representing Mexico in the World Baseball Classic. His rehab schedule will not allow him to play winter ball, but the Marlins anticipate Amezaga will be ready for spring training.

The length of his recovery, which is normal for his type of injury, may mean he won't be with the Fish next season.  I doubt he will command much of an increase in salary for next season, but if the front office feels there may not be a chance of him being a 100% by the time of spring training.  Then they will non-tender him.  We will know soon.