Jake Paul recently revealed that his knockout loss to Anthony Joshua might have worse long-term effects than anyone initially expected, saying that his consequential broken jaw could force the end of his career . Former UFC welterweight contender Matt Brown is calling his bluff on the injury update. Brown rejected Paul's claim, saying that in his 18 years of fighting experience, "jaws heal well." 'The Immortal' bluntly stated that he did not believe a broken jaw could cause the end of a career, noting that countless fighters, including himself, have endured the same pain. "Never fight again bc of broken jaw? How does that work?," Brown tweeted. "Jaws heal well. I've had mine broken twice and didn't even get it wired." Never fight again bc of broken jaw? How does that work? Jaws heal well.…