McClellin has been out since Week 2 with a hand injury. Williams missed last weekend's 27-13 win at Atlanta with a neck injury.
Miami center Samson Satele is active after he was listed as questionable with a hamstring injury.
The Dolphins' inactive list includes wide receiver Brandon Gibson (hamstring), safety Jimmy Wilson (hamstring), guards Shelley Smith and Billy Turner, offensive tackle Jason Fox, defensive tackle Anthony Johnson and tight end Harold Hoskins.
AP NFL website: www.pro32.ap.org and www.twitter.com/AP-NFL