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Chuck Wepner
Self

Sylvester Stallone
Self

Muhammad Ali
Self (archive footage)

George Foreman
Self

Don King
Self

Vince McMahon
Self

Sonny Liston
Self (archive footage)

Mike Douglas
Self (archive footage)

James Brown
Self (archive footage)

Hulk Hogan
Self (archive footage)

André Roussimoff
Self (archive footage)

Howard Cosell
Self (archive footage)

Irwin Winkler
Self

Jake LaMotta
Self (archive footage)

Jerry Izenberg
Self

Floyd Patterson
Self