"Chargers RB Darren Sproles remains the most frequently mentioned free-agent possibility in St. Louis as a change-of-pace backup to Rams RB Steven Jackson. But another attractive option generating some behind-the-scenes buzz at Rams Park is Cadillac Williams, who took on a new role this past season in Tampa Bay as an effective backup behind LeGarrette Blount. "Cadillac would be a perfect fit behind Jackson," one team insider said. "I hear he had no problem accepting a part-time role in Tampa. The one thing you have to wonder about, though, is whether the Bucs would really be willing to let a guy like that leave.""