On August 7 , 2008 , Williams underwent surgery to repair a herniated disk in his back .
On July 24 , 2008 , the second day of the Bears Training Camp , Williams was forced to leave practice due to back spasms .
On August 7 , 2008 , Williams underwent surgery to repair a herniated disk in Williams ' back .
On July 24 , 2008 , the second day of the Bears Training Camp , Williams was forced to leave practice due to back spasms .