Len Lesser, the veteran character actor best known for his scene-stealing role as Uncle Leo on "Seinfeld," has died. He was 88. Lesser's family said in a statement that he died Wednesday in Burbank, Calif., from cancer-related pneumonia. .. list of television credits included parts on "Get Smart,""That Girl,""The Munsters,""The Monkees,""The Rockford Files,""thirtysomething,""ER," and "Everybody Loves Raymond," .. film credits included "Outlaw Josey Wales,""Kelly's Heroes,""Birdman of Alcatraz" and "Death Hunt." .. most recently .. TV drama "Castle."