Injuries sustained by several players in high profile cases have troubled concussion activists. They say that despite clear progress in the recognition and treatment of head injuries in soccer, it is often up to the injured athlete or that athlete’s coach to determine when an injury requires removal from play. Mandatory stoppages and temporary substitutions have been proposed and discussed by FIFA, soccer’s world governing body. But in the absence of strict rules throughout the sport, concussion treatment continues to vary widely.
