Breaking down NFL combine OLs

When evaluating offensive linemen, it is important to consider all aspects of their games -- pass protection, run blocking, awareness and toughness.

Below are the categories in which Scouts Inc. grades offensive line prospects, as well as our ranking of all offensive linemen invited to the 2013 NFL combine. Also included in this cheat sheet are five-year measurement and timing trends for all three positions, Round 1-2 offensive line picks from the 2012 draft, and recent offensive line market trends.