Chris Williams' role for St. Louis

After assessing what they got out of veteran OL Chris Williams during the 2012 season -- and what else was out there on the market -- the St. Louis Rams elected to re-sign the former first-round pick of the Chicago Bears on Monday, according to ESPN NFL Insider Adam Schefter. It's a one-year deal, worth up to $2.75 million depending upon performance. So how does he fit in to the Rams' plans on the O-line?