Jeff Legwold ESPN Senior Writer
The Broncos' decision on Russell Okung formally gives the team an opening at left tackle -- they were already proceeding in offseason planning as if Okung's option bonus would no be paid. In that light the draft is fairly thin at left tackle in terms of walk-in starter potential, but at No. 20 the Broncos will likely have a chance at one of top three tackles on the board --Cam Robinson, Ryan Ramcyzk or Garett Bolles. But they haven't taken an offensive lineman in the first round since Ryan Clady in 2008.