On June 2nd, Armando Gallaraga was one out from a perfect game when the umpire, Jim Joyce, called Jason Donald safe on an easy ground ball.
After looking at the replay, there was no doubt Donald was out. In other words, Joyce cost Gallaraga his chance at history.
On June 18th, there was another bad blown call in sports. In the 2010 FIFA World Cup, the United States was playing Slovenia in a crucial Group C Match. The score was tied and Maurice Edu seemed to score the go ahead goal in the 86th minute.
Instead of giving the USA a much deserved 3-2 victory, the referee, Koman Coulibaly, called off the goal. Upon viewing the replay, there were no offsides or fouls and the goal should have been counted.
These two incidents made me think where Jim Joyce's and Koman Coulibaly's calls rank in the top ten blown calls in sports history (to give you a hint, neither is number one).
There are some famous calls on this list, and others that will surprise you