nobody expects umpires to be infallible, and even good umpires will miss some calls, but there are notoriously bad umpires - bruce froemming, cb bucknor, phil cuzzi, doug eddings, joe west, angel hernandez, joe brinkman - who have been in baseball for years. everyone knows they suck and yet they keep their jobs. there should be some accountability, where the bad umpires are fired and good umpires from the minor leagues are brought in to replace them. there's accountability among players, managers, general managers... if a general manager was as bad at his job as c.b. bucknor (usually voted the worst umpire in the game by the players) is at his, he wouldn't last 13 years, as bucknor has. i'm not saying that mlb should clean house, but there's absolutely no turnover among umpires until they retire or decide to do something else with their lives, and that's stupid.