In this Sept. 19 file photo, a fan watches as the baseball drops away as Boston Red Sox left fielder Conor Jackson, right, leaps into the crowd on an unsuccessful attempt to catch a foul ball hit by Baltimore Orioles' J.J. Hardy in the first inning of the second game of a doubleheader at Fenway Park in Boston. New replay rules will allow umpires to look at this type of play.

AP file photo by Charles Krupa