To correct his injured hand, Brown recently had surgery, his seventh career fight-related operation, to be exact.
"I'm in a cast for five weeks, and I need four weeks of rehab," he said.
But that's not all. He potentially could have a bigger, much more serious issue to address.
"I am seeing a cardiologist," Brown said. "It's something to do with my heart rate not being right.
"It happened in the middle of camp. We thought we were overtraining because I was peaking hard, and all the sudden, I started getting more and more tired really quickly. It didn't make any sense. I'd be sparring for half a round, and I was getting exhausted. But two weeks before, I was mowing through everyone in camp."
Although he did experience the same sensation against Nunes, it was even more pronounced in the Yahya fight.
"My body shut down," he said. "I had this weird lactic acid buildup real early. It's the most bizarre thing. It just wasn't me."
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