A University of Washington study finds that although students know the symptoms of a concussion they are unlikely to report head injuries to their coach, which doctors fear puts them in serious risk.

At least a half-dozen states are considering measures that would toughen restrictions on young athletes returning to play after head injuries, inspired by individual cases and the attention the issue has received in the NFL.

Team officials said Andrew Swank, 17, took a hard hit during a game Friday night in Spokane and collapsed on the sidelines. He died Sunday night after surgery to relieve pressure on his brain.

Nearly three years ago, Zack Lystedt made a tackle on the football field and suffered a concussion. He was in pain, but coaches put him back in the game. He later collapsed with a brain injury. Lystedt and his family have reached a settlement with...

Nearly two years ago, Zackery Lystedt suffered two vicious hits and a severe concussion while playing football for Mount Tahoma Junior High. His coaches, who thought the boy was fine, sent him back in the game. But as soon as the final whistle blew, Lystedt collapsed.

The state now has what advocates say is the nation's toughest law regulating when high school athletes can return to games after having sustained a concussion.

13-year-old Zackery Lystedt is breathing on his own and off a respirator after suffering a severe brain injury during a game for Mount Tahoma Junior High.