Seinfeld actors - Len Lesser

Len Lesser is the Uncle Leo in 14 episodes. The first: The Pony Remark (Season 2 Episode 2).

Uncle Leo is Jerry's uncle (his mother's brother), a bit character who is, even by Seinfeld universe standards, eccentric. He is often loud and somewhat boisterous. He lives in New York city, affording him frequent chances to bump into his nephew.