They think it strengthens the jaw muscles and can help relax the fighter before a fight.
You would have to ask or watch to know his brand.
Most likely big league or bazooka . Chewing fun strengthens the jaw for a boxer
Probably got his own TMT brand of gum lol
Nah I don't know, maybe it's different gum everytime, who cares?
Hmmmmm let me see............. Mint!