"He underwent surgery this morning," he told BBC Sport. "Everyone's talking about his next move. I can't even guarantee he'll box again at the moment.
"It was a horrific injury to suffer. There have been a few occasions when people have boxed on with broken jaws - I couldn't imagine anything worse - but they are extraordinary people, fighters, and he found the bravery to carry on.
"The doctor, who doesn't know a lot about boxing, was quite astonished when I told him he had boxed for half an hour with a broken jaw."
The match between Burns and Beltran ended in a controversial draw and could go to a rematch should the former return to the ring.