Welterweight Super Middleweight Heavyweight Lightweight Cruiserweight Super Bantamweight Weight Disparity Junior Middleweight Weight Discrepancy Jumping Weight Classes Fighter Preparation Challenges Championship Titles Light Heavyweight Middleweight Terence Crawford Super Middleweight (168 pounds) Middleweight Division 168-pound Division Super Middleweight Division Middleweight (160 pounds) Light Heavyweight (175 pounds) Welterweight (147 pounds) Bantamweight Junior Lightweight Cruiserweight Division Heavyweight Division 140-Pound Naoya Inoue Light Heavyweights 140 pounds 140 Pounds Junior Welterweight Welterweight Division Lightweight Division Men's Boxing Champions Flyweight Impact on Fights Women's Boxing Undisputed Champions