Miami signed linebacker/defensive end Porter Gustin on Wednesday, who formerly spent 3 years w/ Cleveland between the active roster and practice squad. I added the highlights the Dolphins posted yesterday, but its pretty obvious Gustin is competing to be a depth player: They also waived DB Javaris Davis and DE Daeshon Hall. Davis was with us for two seasons on the practice squad and got into one game for 2 tackles and a deflection. Hall was signed a few months ago and I don't know his background.