<P> MLB was the last of the four major North American professional sports leagues to implement an instant replay review system . Instant replay review was first implemented during the 2008 season . Under that system , only the umpire crew chief could initiate a review , and one or more members of the umpiring crew would review the video at the stadium and render the decision to uphold or overturn the call . Only boundary home run calls could be reviewed , either if the initial call was a home run but might not have been ( e.g. , spectator interference or a foul ball near the foul pole ) or if the initial call was not a home run but might have been ( e.g. , the ball hit an object such as a railing beyond the outfield wall and then bounced back onto the field ) . </P>
<P> MLB was the last of the four major North American professional sports leagues to implement an instant replay review system . Instant replay review was first implemented during the 2008 season . Under that system , only the umpire crew chief could initiate a review , and one or more members of the umpiring crew would review the video at the stadium and render the decision to uphold or overturn the call . Only boundary home run calls could be reviewed , either if the initial call was a home run but might not have been ( e.g. , spectator interference or a foul ball near the foul pole ) or if the initial call was not a home run but might have been ( e.g. , the ball hit an object such as a railing beyond the outfield wall and then bounced back onto the field ) . </P>
when was instant replay first used in mlb
when was instant replay first used in mlb
2008 season
2008 season