The Miami Dolphins are expected to sign offensive tackle Michael Dunn, according to NFL Draft Diamonds. Dunn was a member of the Birmingham Iron during the short-lived Alliance of American Football season this spring, but the suspension of operations of that league has freed their players to sign with NFL franchises. The Dolphins, who need depth on the offensive line and only have 58 players on their roster when the league allows 90 players, can use a developmental lineman like Dunn to bolster the roster during the team’s offseason training program.