Baseball purists lobbied against the implementation of replay, arguing that a slow game would become even slower. After reviewing many uses of instant replay, each use of replay required the umpires to leave the field for under five minutes. Another predicted criticism of replay would be that it would lead to calls for increased uses of replay. Would managers ask for a red flag to throw to review a close play at first base, like the NFL? Did the second baseman or shortstop really touch second base on that double play turn (probably not)? Thankfully, for those purists, that hasn't been the case. What we have seen, however, is the effective use of technology by a game that stands close to its traditional roots. Close calls are reviewed, the call is made correct if it wasn't already, and the game continues. What more can fans ask for?
MLB.com's history of replay use.