Naked Sport: Welcome to the Sewer (1993)

Produced by PBS in 1992, this documentary explores the darker side of boxing. It follows the career of a young Shannon Briggs and includes interviews with Evander Holyfield, Larry Holmes, Teddy Atlas, Dan Duva, Kathy Duva, Lou Duva, Bobby Czyz, Bob Arum, Mike Marley and even Muhammad Ali.