On "Seinfeld", who did Kramer punch while at fantasy baseball camp?

On "Seinfeld," Kramer punched Mickey Mantle while attending fantasy baseball camp.

The story is told in the Season 4 episode "The Visa," after Kramer returns early from a Yankees fantasy camp in Florida. He describes a chaotic brawl involving former Yankees players and proudly—or horrifyingly—announces that he punched Mantle in the mouth. Kramer later realizes that the person he struck was his baseball idol.

Mickey Mantle was one of the most celebrated players in New York Yankees history. A switch-hitting center fielder, he played his entire 18-year Major League Baseball career with the Yankees, from 1951 through 1968, and won three American League MVP Awards. The incident itself is fictional, part of Kramer's exaggerated storytelling and the show's playful use of baseball mythology.

A common mix-up is confusing Mantle with the other retired Yankees named during Kramer's account, including Joe Pepitone, Clete Boyer, and Bill "Moose" Skowron. Mantle is specifically the player Kramer says he punched.