By Alek Arend Patrick Mahomes was fuming during the closing moments of Sunday night’s AFC showdown between the Buffalo Bills and Kansas City Chiefs. With the game officially out of reach, in favor of the Bills, CBS’s broadcasting team captured Mahomes being restrained by his teammates on the sideline. Mahomes appeared to be yelling at a nearby sideline official, although it’s unclear if that’s who the Chiefs quarterback was taking his frustrations out on. Mahomes rarely loses his composure. But he had to be restrained by several teammates to ensure he didn’t do something he might regret. It wa…