The one thing umpires don't want is to be noticed for the wrong reason. Here's a look a few memorable controversial calls in World Series games:
1975 Boston vs. Cincinnati, Game 3
Ed Armbrister of the Reds bunted, then collided with catcher Carlton Fisk. When Fisk recovered and picked up the ball, he threw it away and the Reds went on to win 6-5. Plate umpire Larry Barnett ruled there was no interference on the play - and the Reds went on to win the Series in seven games.
1985 Kansas City vs. St. Louis, Game 6
First-base umpire Don Denkinger calls Jorge Orta safe on a grounder, though replays showed that pitcher Todd Worrell had beaten him to the bag. It was costly. The Royals came back from 2-1 to win 3-2, tying the series at 3, then riding the momentum to a blowout win in Game 7.
1991 Minnesota vs. Atlanta, Game 2
Twins first baseman Kent Hrbek appeared to lift the leg of Ron Gant, who had singled, off the bag in tagging him out. That ended Atlanta's inning and the Twins went on to win 3-2, en route to the championship in seven games. Umpire Drew Coble stood by his decision, though many viewers felt Hrbek was out of line.