Derby (foot) was a full participant at Thursday's practice, Armando Salguero of the Miami Herald reports.
Derby has missed five straight games due to a foot injury, but he finally appears to be nearing a return to the field. Though he had worked as the Dolphins' starting tight end prior to missing time with the injury, it's unclear if Derby would vault back ahead of Nick O'Leary and Mike Gesicki on the depth chart if cleared to play Week 9 against the Jets.