ONL Coleman Baseball Signed by 1978 Heavyweight Boxing Champ Leon Spinks. Lot 697. ONL Coleman Baseball Signed by 1978 Heavyweight Boxing Champ Leon Spinks. Nm-m ball with a ballpoint 10 on the sweet spot. Spinks was one of the boxers who defeated Muhammad Ali. Authenticated by Kevin Keating. Winning Bid $20. Back to List Winning Bid $20 Back to List