Chris Williams spent more time either injured or benched than he did as a starting left tackle, which usually isn't a good sign when you're a first-round pick. That era came to an end, as the Bears announced they've parted ways with the embattled left tackle.
Williams started 16 games in 2009 first at right tackle, then at left when Orlando Pace couldn't play any more, and started at left guard starting in 2010. He was moved back to tackle in the offseason but couldn't unseat J'Marcus Webb, and rode the bench even since.
The corresponding roster move is the return of Zackary Bowman. Sherrick McManis has been slowed a little with a hip strain, so Bowman is presumably around to shore up special teams.
Bowman was a 5th round pick in 2008 by the Chicago Bears, and played his first 4 seasons in Chicago. After an offseason stint in Minnesota in 2012, he was waived by the Vikings, and now is returning to Chicago.