This just came out. Makes it seem it was more 'personal issues' that caused the ultimate demise of this bout.
"I'm having some personal issues at home," Hallman said. "I'm not fit to fight. I told Dana [White] what my issues were. He understands family matters, and he was cool with me not fighting."
According to Hallman he passed out earlier today while cutting weight. At that time, he was two pounds over the 156-pound weight limit. He was then given fluids via an intravenous, which bumped him up to seven pounds over the lightweight limit.
When Tavares was notified of this news, he said that if Hallman got down to three pounds over the limit, he would accept the fight at a catchweight. Hallman told MMAFighting.com that he did just that, but according to Hallman, Tavares then asked for him to cut one more pound.
It was at that point that Hallman spoke to White about his personal issues and requested to be removed from the card. He said White was very understanding when he told him about his issues, which he wanted to keep private.