A teammate's injury has accelerated rookie Patrick Peterson's ascent into the Arizona Cardinals' starting lineup. The fifth overall draft pick will start at cornerback when the Cardinals open the season Sunday against the Carolina Panthers. Coach Ken Whisenhunt likes to bring rookies along more slowly but a season-ending knee injury to starter Greg Toler forced his hand. Read more: http://espn.go.com/nfl/story/_/id/6942075/arizona-cardinals-start-rookie-patrick-peterson-cornerback
