There are few occurrences in sports as unexpectedly joyful as foul balls. You never know when a ball could come careening into the stands, and that bit of uncertainty adds a certain level of excitement to the game.

Some of the time foul balls are out of the reach of fans, but when fans have a chance to grab the ball, good things can happen.

Here's a review of the best (and worst) foul ball catches of 2012:

Follow us on Facebook and Twitter to read them first!

Story continues below