'Seinfeld's' Uncle Leo, Len Lesser, Dies

7:05 PM PST 2/16/2011 by Mike Barnes

Actor Len Lesser, 88, passes away Wednesday of pneumonia related to cancer.

Len Lesser, perhaps best known as Uncle Leo on Seinfeld but a veteran actor with more than 500 appearances on film, television and the stage during his six-decade career, died Wednesday in Burbank, Calif., of pneumonia related to cancer. He was 88.