R.A. Dickey Throws David Letterman Knuckleballs on ‘Late Show,’ Says ‘I Feel Like I’m in the Circus’ (Video)

R.A. Dickey is the toast of New York, even if he didn't start the All-Star Game.

The Mets ace stopped by The Late Show on Wednesday night to hang out with David Letterman, and Dickey taught the host how to throw his trademark knuckleball.

He then threw a couple to Letterman, who struggled to catch them with an oversized mitt, while admitting, "I feel like I'm in the circus."

Check it out in the video below.

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