Len Lesser, 'Seinfeld's' Uncle Leo, Dead at 88

Len Lesser, best-known to TV fans as Uncle Leo on 'Seinfeld,' has died.

Lesser died from pneumonia in Burbank, CA. He was 88.

He had a very long television career, making his first appearance on a 1949 -- yes, 1949! -- episode of 'Studio One.' During the course of his 60-year career he appeared in such shows as 'Dragnet,' 'Alfred Hitchcock Presents,' 'Gunsmoke,' 'Mike Hammer' (the 50s version), 'Playhouse 90,' 'The Jack Benny Program,' 'The Untouchables,' 'The Outer Limits,' 'The Wild, Wild West,' 'Get Smart,' 'Boy Meets World,' 'ER,' 'Cold Case' and dozens of others.

His most recent role was a 2009 appearance on 'Castle.'

Just this weekend, Retro TV ran an episode of 'Peter Gunn' from 1959 that co-starred Lesser. 'Seinfeld' fans might be surprised to know that Lesser had been working that long, since they know him best from that NBC sitcom (and 'Everybody Loves Raymond').
(Source: http://www.tvsquad.com/2011/02/16/seinfelds-uncle-leo-len-lesser-dead-at-88/)