Haye would beat him fairly comfortably I would imagen. When he is a fully fleged heavy. He will be around 225lbs which will make him bigger heavier and he will be faster than fast Eddie. Haye KO.
How is this even an issue? Haye and Chambers will most likely never fight. Povetkin will beat Chambers.
You a trainer? For a boxer, 3-4 good tempo run miles 5 days a week is good stamina, because on top of that, they're working in the gym and gaining actual ring endurance. Road work lets you lay a base for that actual fight fitness, it is not an end to itself. I doubt Wilson will be running a marathon anytime soon.
Chambers isn't a threat. He's a good fighter but has yet to show anything that would make us sit up. Haye would have no problem boxing with this guy. I believe he is taller, rangier, faster, heavier hitting and he carries 215-225 no problem.