Mathieu, Bethel, Rucker back at practice for Cardinals (Yahoo Sports)

Tyrann Mathieu, Justin Bethel and Frostee Rucker practiced for the first time this training camp Sunday and Arizona Cardinals coach Bruce Arians said ''there's no doubt'' all three will be ready for the Sept. 11 season opener. Mathieu, an All-Pro safety last season, is coming back from surgery to repair a torn ACL. The cornerback Bethel is returning from foot surgery and defensive lineman Rucker had a foot injury that may have been related to offseason ankle surgery.