Philbin has announced that Ryan Tannehill has been named the starting quarterback— Miami Dolphins (@MiamiDolphins) August 20, 2012
Tannehill earned the job through both performance and circumstance, outplaying rival Matt Moore and advancing in part because of the knee injury to David Garrard. The Phinsider reports that the move has been all but official for a while judging by the team's actions (namely Tannehill taking the majority of the snaps with the starters after Garrard's injury).
The rookie's first task will be against the Atlanta Falcons at Sun Life Stadium Friday night. Tannehill will be the first rookie quarterback to start for the Dolphins since Dan Marino, and creates a record four rookie starting QBs in one season (Andrew Luck, Robert Griffin III and Brandon Weeden).