SI.com's NFL personnel expert Michael Lombardi
evaluates the Lions' units.
Kitna functions well with good cast, but backup is thin.
Smith must prove he's a No. I. Tatum Bell is change-of-pace back.
Full complement: size, speed and possession guys. All can RAC.
Area of concern, but Lions want to run so need a blocker here.
Even if first-rounder Cherilus plays well, many holes remain.
Redding is good, but trade of Shaun Rogers left huge void.
Sims is an all-over-the-field playmaker; others not athletic enough.
Searching for safety fix to no avail. New corners fit the scheme.
Reliable kickers who can handle elements when necessary.