Caught the replay this morning. Dubois fought a great fight, AJ never fully recovered from that right hand that clipped him perfectly on the chin, dropping him to his hands & knees in the first round.
It's easy to see in hindsight when you can rewind & fast forward the fight, but everything that came after just looked like AJ in a sort of dazed autopilot mode. Every blow that made any sort of contact with his head after seemed to stun him. If Dubois had taken a breath & been a bit more precise with his shots in the 2nd & 3rd, he probably would have had him out of there sooner and/or properly KO'd him cold.
AJ's best moment was ultimately what led him to getting sparked for the final time, landed a good blow & got a bit too crazy trying to press a finish, I think he thought Dubois was hurt more than he was, hence the presence of mind to keep composed & catch him twice coming in.