As the Kansas City Chiefs opened camp Friday on lush, green practice fields dotting a countryside yellowed and browned by drought, most eyes were on just three guys. How are the knees of Jamaal Charles, Eric Berry and Tony Moeaki holding up? Fingers are crossed. Taken together, the knee injuries that took out the Pro Bowl running back, Pro Bowl safety and promising tight end before the 2011 season probably had more to do with last year's dismal campaign than any other factor. Had Charles been given a chance to duplicate his 1,467-yard season of 2010, Todd Haley might still be the coach rather than Pittsburgh's offensive coordinator.
