don't really know if this needs much more explanation... BUT USAToday.com lays out what went down:

This young Texas Rangers fan is the coolest kid in Texas. During the fourth inning of the Blue Jays-Rangers game, Toronto third base coach Luis Rivera tossed him a foul ball, and the fan saw his opportunity to score major points with the girl sitting behind him. The boy already had a ball in his possession, so when he caught the game ball in his glove, he quickly turned and passed off the decoy to the girl.