Seattle Seahawks head coach Pete Carroll likes to run smash mouth style football, and having a fullback has always been a big part of that. However, this year the need to have a fullback has taken a backseat due to injuries at running back and tight end so the roster spot was needed elsewhere.
This is where Luke Willson comes in.
He is now being used as an H-Back, or the de facto fullback when a lead blocker is needed out of the backfield. Willson is very athletic, mobile, and with his size should be a good fit for the role.