Len Lesser, the actor who played Uncle Leo on Seinfeld, died Wednesday at the age of 88. Lesser appeared in just 15 Seinfeld episodes but was one of its most popular characters. He began acting in the 1950s, appearing opposite Steve McQueen in Papillon and Clint Eastwood in Kelly’s Heroes and The Outlaw Josey Wales. His last TV appearance was for 2009’s Castle.
