The nature and severity of Ledbetter's ankle injury remain undisclosed, and his placement on injured reserve guarantees he won't return for at least eight weeks. The undrafted rookie out of Georgia made his NFL debut during Miami's season-opening loss to the Ravens, in which he posted four tackles and 0.5 sacks.

The undrafted rookie out of Georgia had a respectable role in the defense, working on 51 of 77 defensive snaps (66 percent). It was an ugly overall performance for the Dolphins' defense, but Ledbetter showed potential with his half sack. It will be another tough contest in Week 2 against the Patriots.