James Cook has had an impressive start to the season, averaging over six yards per carry on 44 attempts. Cook will be going against a Dolphins defense that's been pretty weak in the running game, as they've allowed 390 rushing yards in three games (130 per game).
The second-year running back needs to provide that spark to help keep Bills' offense from being one-dimensional. Cook's running success will also be crucial in eating up time-of-possession to keep the Dolphins offense off the field and take less pressure off Allen.
Expect Cook to be used more on the receiving end. So far this season, he only has 10 catches for 67 yards. Cook's versatility will be key in keeping the Bills offense on the field this Sunday, and most importantly, keeping the ball out of Tua Tagoviola's hands.