The answer to today's Dead Guy In the Envelope is Ken Norton, Sr.
Ken was an American boxer who was a former WBC world heavyweight champion.
Norton fought Muhammad Ali three times, beating him once, including breaking Ali's jaw, which dubbed Norton, "The Jawbreaker."
He turned down the part of Apollo Creed in Rocky however he played the title character in the movie Mandingo.
Ken was inducted into the World Boxing Hall of Fame in 1989.
Norton died at the age of 70 in 2013 after suffering a series of strokes later in life.
His son, Ken Norton, Jr. is a former NFL Linebacker for the Cowboys and 49ers and the current Linebackers Coach for the Seahawks.
