His stamina was not an issue in the N'Dam and Rosado matches, he's clearly worked out his issues in that department. And let Floyd deflect a Lemieux shot with his shoulder, he'll end up with a broken shoulder. Like I said if Maidana can win almost 6 rounds off of him, Lemieux can, and Lemieux hits far harder than Chino.
Couldn't find Joachim Accline but finds Mayweather? Accline was also knocked out by the lightning fast and fleet footed Angulo! (Sarcasm)
And Kell Brook looked like hell against Carson Jones, but looked great in losing to GGG. It happens. David clearly wasn't in a good place for that match, and that David certainly wouldn't have beaten with relative ease Rosado, Guerrero, Tapia and N'Dam. So he's kind of improved, a lot.
Stop it with Floyd at 160 have you seen the size of Floyd Mayweather compared to Lemieux,size wise Lemieux struggles to make 160?
You cannot compare Brook to Lemmy. Brook also got destroyed by GGG who many GGG fans say GGG wasn't even serious about the fight and toyed with him. Brook looked good for 2 rounds thats it. He did not belong at 160 as a career WW and it was a business fight. As for Lemmy he was carefully matched after the Rubio and Joachim losses. I am surprised you cannot see that. He has not faced a opponent who moves as well as Joachim since then. He would have beaten Rosado, Guerro, Tapia, and Ndam anyway. Rosado is tailor made for Lemiuex and stood right in front of him. Tapia was coming off a 4 round destruction and moving up in weight. Guerro tried to go to war with Lemmy and also stood in front if him with ear muffs. He gassed out against Ndam and was being outboxed by Ndam through the fight especially in the second half. Ndams chin though is weaker than an egg shell and gave Lemmy the knockdowns (while he was head hunting all night ) to win the fight along the rounds he won when Ndam was in survival mode. Ndam was also knocked down 6 times against Quillin. Lemmys stamina has improved a little he still gasses and headhunts. He has very good power but is carefully matched and is still crude. But I don't have to explain why you will defend Lemmy to the end of the earth do I?
Mayweather was not even big at welterweight. He is a LOT smaller than Brook. There comes a time with size disparity that skills can no longer pay the bills. At 160 I would bet on David walking through Floyd's shots and busting him up bad. But Floyd would not allow him to fight at 160 and I doubt David could even make 154.