I watched the last few innings of the Detroit/Cleveland game today (though it wasn't until the final inning that I realized that the Detroit pitcher, Armando Galarraga had a perfect game going instead of a no hitter.
Regardless, the first base umpire missed a call on Damon 's ground ball in the bottom of the 8th, keeping things alive for the Tigers to score two runs in the inning (making it 3-0 going into the 9th). The ump would return the favor with an awful call with 2 outs in the ninth, calling Jason Donald safe on a close play in which replays showed him to be out by a half-step (which, in baseball terms, might as well be a mile).
Donald couldn't believe it. Neither could anyone else. And while Galarraga did the professional thing and went back and got the last guy out, the way the Tigers went after the ump was terribly unprofessional.
Regardless, the umpire's Wikipedia page was repeatedly hacked after the game, including (at one point) started as:
"Ángel Hernández (born August 26, 1961 in Havana, Cuba) is a horrible umpire in Major League Baseball, and is the only MLB umpire to be legally blind."
Heh. Only in 2010...