I call complete bullshit on this!
A professional athlete like himself would not risk injury ( and not being able to fight ) by not wearing a mouth piece while training. His trainers would force him to wear it and he himself would realise its stupid not to... You only get one set of teeth, he'd where one grappling and sparring. If he "forgot" or " lost " it then he'd probley have one day of controlled training without it but even that's unlikely as he'd have more than one mouthpiece ffs lol.
This is just bull shit. Same with the shattered foot remark! For some reason jones team is in damage control!