. . . "Uncle Leo is a fictional character portrayed by Len Lesser in the American sitcom Seinfeld. He is Jerry Seinfeld's uncle. He made his debut in the second-season episode \"The Pony Remark\" and appeared in at least one episode in each of the additional seasons through the show's nine-season run. On the 25th anniversary of the show's debut, Rolling Stone ranked Uncle Leo as No. 6 on its list of \"100 Best Seinfeld Characters,\" behind only Newman at No."@en . "Uncle Leo"@en . . . "The Pony Remark(1991)" . .