New Orleans Saints officials confirmed Tuesday what they have suspected for several days, announcing that rookie wide receiver Chase Lyman sustained a potential season-ending knee injury during a minicamp practice last week. A fourth-round choice, and the 118th player selected overall, Lyman tore the anterior cruciate ligament of his left knee during a non-contact drill. It is the second time in just seven months that Lyman has torn the ACL in his left knee, and it continues a stretch of serious injuries that limited the former University of California star to just eight starts during his college career.