Chicago, IL -- (Sports Network) - Chicago Bears first-round draft pick Chris Williams had surgery to repair a herniated disk in his lower back, the team announced on Thursday.

The 14th overall pick in this year's draft, Williams was expected to start at left tackle, but he left the Bears' second practice on July 24 because of stiffness. He's been sidelined since but remains on the 53-man roster.

No timetable was announced for his return.