There is
never any sparring towards the latter part of any boxer's camp. If he got laid out in sparring, it would've been early on and the only relevance that would have in the fight is his confidence/mindset,
not his brain's health. Zab Judah and several others fully knocked out Floyd during spars and did Floyd ever let that get to him? Did he ****. If Ruiz concussed AJ during the fight (which is probable) it was down to Ruiz' punches and AJ's lack of skills, and concussions have happened in countless fights and it's a completely legit way of beating an opponent.
You know...I heard AJ took some body shots in sparring and they were ouchie, so when Ruiz hit him to the body it made AJ have flashbacks