A new study of plays during the 2014 World Cup games finds protocols for head injury assessment weren’t followed at least 60 percent of the time.
Hasselbeck took the Seattle Seahawks to Super Bowl XL during his 17-year career.
But the changes recover after rest.
Players had fought the deal because it doesn't cover future victims of brain disease CTE.
The former professional wrestler says he hid the effects of concussions which included seizures.
The former star wide receiver says he wishes he hadn't played football.
The number of reported concussions in English rugby increased by 59 percent last season.
Some of the former NFL players examined had suffered only one concussion.
The question isn’t, “Is football dangerous?” It’s, “Can it ever be safe?”
There’s room for improvement, according to a report published in the Journal of Sports Medicine
Doctors never have to make bad guesses about whether a player has a concussion again