From a New York Times obit by Alex Williams headlined “Burt Young,’Rocky’ Actor
who Played Complex Tough Guys, Dies at 83”:

Burt Young, a burly Queens-bred actor who leveraged a weary gravitas and bare-knuckled demeanor to build a prolific career as a Hollywood tough guy in films like “Chinatown,” “Once Upon a Time in America” and, most notably, “Rocky,” for which he was nominated for an Academy Award, died in Los Angeles.

With his bulldog build and his doleful countenance, Mr. Young amassed more than 160 film and television credits. He often played a mob boss, a street-smart detective or a bedraggled working man.