Robert Green
English goalkeepers have a long history of committing terrible career-defining mistakes. Green added his name to this unwanted list during the 2010 World Cup. England played the United States in a group game. Clint Dempsey took an optimistic shot that skidded across the ground and bounced off Green’s palms.

Green dropped the ball and it trickled agonizingly into the net. It was a nightmarish moment for the West Ham star because it cost his team a win. England dropped him in favor of David James in the next match. He barely played for his country again after this horrible moment (via The Guardian).