It's looking doubtful that Cardinals quarterback Kevin Kolb will start this weekend in his first trip back to Philadelphia, according to a source. Kolb is dealing with a fairly significant sprained foot, as well as a turf toe injury that he suffered during a Week 8 loss at Baltimore. Cardinals coach Ken Whisenhunt said Monday that Kolb was day to day and the team was using a wait-and-see approach with its signal-caller. The Cardinals acquired Kolb in an offseason trade with the Eagles, with whom he started seven games in four years, sending cornerback Dominique Rodgers-Cromartie and a 2012 second-round draft pick to Philadelphia.