Show: Seinfeld
Year: 1996 (Season 8, Episode 9)
Cameo role: Themselves

As far as athlete cameos go, this one is pretty classic: Derek Jeter and Bernie Williams don’t have big roles, and it’s obvious they won’t be winning any Emmys for their performance. But if Seinfeld was really about nothing, it was at least about nothing in New York City, and to have two Yankees players actually learning from George Costanza makes all the sense in the world in the Seinfeld universe.