Derby (foot) is listed as questionable for Sunday's game against the Bills, Armando Salguero of the Miami Herald reports.
Derby has been managing the foot issue nearly all season, suiting up just once (Week 10 against the Packers) over the Dolphins' past nine games. Though he practiced fully Friday, it hardly guarantees he'll be active Sunday, as he's logged numerous full practices over the past several weeks only to sit out once gameday arrives. Should Derby be ruled out again this weekend, Nick O'Leary and Mike Gesicki would likely split most of the snaps at tight end.