as you age your training recovery hurts more and you need to do more before and after prep. niggling injuries are virtually guaranteed for a 40 year old pro athlete / nothing you can do about it.
He's either hurt, or he didn't have an opponent for Dec.10th and he was jerking everybody around. I'd go with the latter.
He did not have an opponent and therefore just jerked out of it. It was also getting too late to promote a big fight for Dec 10th. AJ is only going to get some trash to fight him on his 19.95 PPV now- its pretty obvious. They are going to need a decent undercard
Wlad should retire, as soon as possible. He ought to be remembered as a great champion. He maltreats himself, and fans attempting to stay active. Enjoy in retirement, champ !