Dolphins waived FB Ryan Mahaffey. Mahaffey loses out to Jorvorskie Lane for the fullback job. It figures to be a seldom-used position in the Dolphins' West Coast scheme.

Dolphins signed FB Ryan Mahaffey. Undrafted WR Derek Moye was waived in a corresponding move. An undrafted rookie out of Northern Iowa last season, Mahaffey appeared in five games for the Colts. He'll likely be competing with Jorvorskie Lane for a roster spot.

Colts FB Ryan Mahaffey left Sunday's game against the Colts with a concussion. Mahaffey is questionable to return. The Colts have been using single-back formations since he left.

Colts signed FB Ryan Mahaffey off the Ravens' practice squad. Mahaffey is an undrafted rookie out of Northern Iowa, where he played tight end and H-back. He's now the only fullback on Indianapolis' 53-man roster.