He just might get that chance with the Dolphins given their lack of depth at safety.
In Miami, Davis will be reunited with head coach Tony Sparano and secondary coach Todd Bowles.
"The team is a blend of young and experienced players that will eagerly be looking to play hard-nosed, smart, and game-winning football", said Davis. "I intend to be a value-added role player to assist Coach Sparano's rebuilding plan and to provide both leadership in the secondary, on special teams, and in the locker room."
Davis was undrafted out of college but made the Cowboys roster as a rookie. He started 15 games at safety in 2005 and six more in 2006, but got only one start last season.