Yeah, but why? He quit after he hit the canvas twice and was about to get blasted into bolivian. Basically he was saving himself from getting his fragile mandible completely shattered.
On the biggest night of his professional life his heart gives out and he quits. He'll never amount to anything other than a gate keeper.
Well, you win some you lose some. This says more about Hrgovic's lack of punching power than Dubois' chin. His mandible is still a weakness, one that will emerge again in future fights.