Major League Baseball will institute the use of instant replay on Thursday to determine disputed home run calls -- fair or foul, in or out of the ballpark, fan interference -- Commissioner Bud Selig announced on Tuesday.

The system, which has been under study since this past November when the general managers voted 25-5 to explore its use, will launch on Thursday when Minnesota opens a four-game series at Oakland, Texas is in Anaheim to play the Angels, and the Phillies are at Wrigley Field to play the Cubs.

Since it was determined that the use of replay should start when a series opens, it will be in use for all games beginning with Friday's action. Musing that implementing replay was really not like dealing with "Einstein's 'Theory of Relativity,'" the Commissioner said the apropos time to move ahead with it was now.

I think it's about time and I think the amount they are going to start using it is a good place to start... I just hope it doesn't go much more than this.  How far do you think instant replay should go?