Burt Young, the Oscar-nominated actor who played Paulie, the rough-hewn, mumbling-and-grumbling best friend, corner-man and brother-in-law to Sylvester Stallone in the “Rocky” franchise, has died. Young died October 8 in Los Angeles, his daughter, Anne Morea Steingieser, told the New York Times on Wednesday. No cause was given. He was 83.