"Who's On First?": The Sequel

Fallon, Crystal, and Seinfeld revisit Abbott & Costello's classic "Who's On First?" routine, where we finally get to meet the team's first-baseman "Who," second-baseman "What," and third-baseman "I Don't Know."

 Click Here For "Who's On First" Original

Abbott and Costello perform the classic "Who's on first?" baseball sketch in their 1945 film "The Naughty Nineties" first performed as part of their stage act.