CBS Video: R.A. Dickey on Letterman

Mets starting pitcher R.A. Dickey has been one of the best stories during the first half of the season. He just made his first appearance in an All-Star Game at the age of 37 and he's made the knuckleball cool again.

And now, Dickey's been on Letterman. Below is the clip, which culminates in Dickey throwing a few knuckleballs to David Letterman.

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