SI.com's NFL personnel expert Michael Lombardi
evaluates the Cowboys' units.
Romo can make all the throws, and he will keep getting better.
Will be a top backfield if rookie Felix Jones gives them big plays.
Owens is one of the elite, but Crayton is more a No. 3 than a 2.
Witten rarely has a drop; tough, can block and will make plays.
Big and physical, deep at tackle; can be a dominating unit.
Very solid, with nice blend of youth and age, speed and power.
Thomas lifts the unit; critical year for Anthony Spencer.
Need more man-to-man players; teams can pass on Williams.
Kickers are very good; some concerns on coverage squads.