Damian Swann experienced enough concussions as a rookie with the New Orleans Saints to know how they can differ.
"Sometimes you get knocked out, sometimes you don't," he said. "Sometimes you get dizzy right away, sometimes you don't. It's headaches, sensitivity to light. It's a bunch of different things."
Swann should know. He suffered a concussion in each of the last three games he played last season, with the last one leaving him wobbly-legged and woozy as athletic trainers escorted him to the sideline and then the locker room in Week 14 at the Tampa Bay Buccaneers.