Len Lesser
Leonard King Lesser was an American actor, known as Len Lesser. He was known for a key role in the Clint Eastwood movie Kellys Heroes and his recurring role as Uncle Leo in Seinfeld, which began during the shows second season in The Pony Remark episode. Lesser was also known for his role as Garvin on Everybody Loves Raymond.
Lesser was born in The Bronx in 1922. His father, a grocer, was a Jewish immigrant from Poland. Lesser received his bachelors degree from the City College of New York in 1942 at the age of 19. Lesser enlisted in the United States Army the day after the attack on Pearl Harbor, and served in the China Burma India Theater during World War II.
Source: Wikipedia