It's the allure (big name money ?!) of the hvy division that ensures Cruiser is mostly looked at as a jumping off point. Few have ever been content to end career at cruiser. I don't attribute the shortcomings to size as much as skills, being long in career or lifestyle etc. Cooper 'could' have been a superb cruiser but def would have still hit the pipe? Ruiz had a fast none clinchy style at cruiser but was yng with 'skill' to fall back on at hvy. Moorer skipped division completely from lt hvy and WAS a capable hvy, his chin was just made of matchsticks.