The Dolphins have listed David Garrard as their first-string quarterback on a depth chart released Monday.
Matt Moore, who finished 2011 as the starter, is listed as the top backup, with rookie Ryan Tannehill as the third-stringer.
"In no way, shape or form is this finalized," Dolphins head coach Joe Philbin said Monday, according to the club.
Garrard, 34, didn't play a regular-season game in 2011 after being released by Jacksonville in the summer. He has made 78 career starts.
The Dolphins host the Buccaneers in the preseason opener for both teams on Friday night.