For all the discussion about Parker being "too nice" I think he wins that fight if it wasn't in Whyte's backyard or if he came in with a couple of wins under his belt instead of a loss. That both of those factors were against him is on his management, not him. They rolled the dice & were either going to be genius' or fools depending on the outcome. The result is in.
"Coincidently" he was also fighting much less skilled fighters. Don't make this your next thing - "LEAN PARKER READY TO DECAPITATE AJ IN 20 SECONDS". Barry is a Manager/Promoter who decided he was a trainer when he realised he could get more of a cut of David Tua's income. You can see in that interview he is great at the talking aspect of it all. The lack of development or broadening in Parker's skills the past four years indicate the training aspect is missing.