The Miami Dolphins have signed fullback Ryan Mahaffey and waived wide receiver Derek Moye. The 6-foot-2, 255-pound former Indianapolis Colts and Baltimore Ravens player spent last season with the Colts after being signed off the Ravens' practice squad on Nov. 16. He played in five games, catching one pass for five yards. Mahaffey played collegiately at Northern Iowa where he appeared in 51 games with 43 coming in a starting role, he saw action at both tight end and fullback and recorded 28 receptions for 251 yards and six touchdowns. Source: Scout.com
