Its called Rule 7.06..

There is nothing like waking up in the morning, turning on ESPN and seeing that your team lost. But wait, what is this? A controversial obstruction call. How wonderful! NOT!! As you might have not guessed, I am a Boston Red Sox fan. I have no personal ties to Boston, but when your father says you are a Boston fan, then you must be a Boston fan.
The controversial obstruction call was called for a win for the Cards (St. Louis Cardinals). This play also somehow got the first place on ESPN’s top plays. Why?

Boston third baseman Will Middlebrooks tripped St. Louis’ Allen Craig on Jon Jay’s ninth-inning grounder. Third-base umpire Jim Joyce called obstruction. However, if you watch before the obstruction call was called, Allen Craig was called safe at home plate when he made no attempt to touch home plate!

I understand this was a rule and the umpire’s made the correct call, however Jim Joyce (the umpire in this situation) has another famous call that has gone down in history as well. He took away the Detroit Tigers, Armando Galarraga’s perfect game back in 2010. This call by Jim Joyce caused him and his family to receive death threats after Galarraga game.