“Who’s on First?” is a classic comedy sketch by the American duo Abbott and Costello. The routine revolves around a conversation about baseball players’ names, creating hilarious confusion with words like “Who” (the actual name of the first baseman), “What” (the second baseman), and “I Don’t Know” (the third baseman). The rapid-fire dialogue and clever wordplay have made this sketch one of the most beloved and enduring comedy routines of all time.
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Absolutely, “Who’s on First?” is pure comedy genius! Abbott and Costello’s rapid, escalating banter turns a simple misunderstanding into a perfectly structured comedic whirlwind.

The Naughty Nineties (1945) - IMDb

What makes it so iconic is not just the wordplay, but the flawless timing and delivery. Costello’s increasing frustration and Abbott’s calm insistence that “Who” is on first never gets old, no matter how many times you hear it.

The Naughty Nineties (1945) – Once upon a screen…

It’s amazing how a sketch from the 1940s still feels fresh and funny today. It’s been referenced in TV shows, movies, and even classrooms to teach timing and language nuance. Truly a testament to its brilliance.

Abbott & Costello's most famous rendition of their "Who's on First?" comedy  routine. Filmed in 1945 (for "The Naughty Nineties") and later selected for  use and preservation by the Baseball Hall of ...

Do you enjoy other vintage comedy routines like that—maybe some from Lucille Ball, George Burns, or the Marx Brothers?