Catching a foul baseball may be the one of most thrilling experiences you can have as a sports fan; but snagging one seems near impossible. Rob talks to NPR's Mike Pesca about advice he received from Zack Hampel, a guy whose collected more than 3,000 balls from ballgames. He also shares tips from usher Rick Neave and ballgirl Stephanie Kelley who work at DC's Nationals Park.