Tennis player John Isner, who won the longest match ever played, is making the rounds in the U.S. with his new-found celebrity. He threw out the first pitch at Yankee Stadium on Tuesday.

The night before, he was on "Late Night With David Letterman," presenting the "Thoughts That Went Through John Isner's Mind During the 11-Hour Tennis Match." Video:

Tennis player John Isner, who won the longest match ever played, is making the rounds in the U.S. with his new-found celebrity. He threw out the first pitch at Yankee Stadium on Tuesday.

The night before, he was on "Late Night With David Letterman," presenting the "Thoughts That Went Through John Isner's Mind During the 11-Hour Tennis Match." Video:


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