I'm assuming Gabby wins the 1st base job and Fredi goes with 5 bench slots. I think Amezaga, Helms, and Rebelo are locks. I feel Bonifacio will get the MI reserve spot. This puts Andino in a tough spot since Amezaga can play the infield too.
This leaves Carroll, McPherson, Gibbons, Miller, and De Aza for the 5th spot. All eyes point to Brett who has put up monster stats in Albuquerque the past 2 seasons. Dallas has the skills to be a major leaguer, especially a DH, but doesn't fit on the Marlins roster with Helms as the backup 3B/1B. I don't think Jay will do enough to impress management. Jai has yet to prove himself in the minor leagues. My sleeper pick is Alejandro who won the CF job out of spring in 2007. He has put up respectable numbers in the minors and has shown a decent eye.