Umpiring in MLB can be a touchy thing. Everyone wants to keep the "human element" in the game, but when calls like these two are made, it makes replay look like a much better option.
Video one show where first base umpire Tim Welke clearly misses a call. Colorado first baseman Todd Helton's foot is at least 2 feet off the bag as the Dodgers Jerry Hairston runs to first.
Video two is about a little trickier call, but still a pretty bad one. Boston's Mike Aviles swung at what would have been strike three. It was
ruled a foul tip by plate umpire Jeff Nelson, and on appeal to first
base ump Bill Welke (Tim's brother) the ball was determined to hit the dirt before
catcher Gerald Laird could glove it. Jim Leyland lets the umpires know his feelings.