I have a lot of trouble with these lists because I simply cannot rank a guy from what I've read about him. Willie Pep is regarded as one of the best who ever laced up gloves, but how can I justify putting him in my top 20 when the only footage I've seen of him is a few clips from a P4P profile on Youtube and HLs of his fights against Sandy Saddler? I've never seen Stanley Ketchel besides his fight with Jack Johnson. I don't remember seeing any of Harry Greb. So how do I rank these guys? How can you rank a guy without seeing footage of him in the ring?