The Dolphins have signed OT Mike Rosenthal to a 1-year contract.  He played in 15 games (3 starts) for the Minnesota Vikings last season and he’s played in 89 games (58 starts) over his 8 year NFL career.  The 6′7″, 315 pound Rosenthal will likely be a backup player as the Dolphins will be looking for offensive linemen in the draft later this month.