Scary World Cup Head Injury Shows Soccer Needs To Change One Of Its Most Basic Rules

During the second half of Uruguay's win over England at the World Cup, Uruguayan midfielder Alvaro Pereira was injured when his head collided with the knee of an English player. Even though he appeared to be momentarily unconscious, Pereira remained in the game, in large part because FIFA's antiquated substitution rules do not allow teams enough time to properly evaluate players for concussions. This particular case is a perfect example. It was clear to anybody with access to a replay just momen...