UCF's John Bol fell to the floor clutching his chest and the 7-foot-2 sophomore from South Sudan had to be helped to the locker room during the second half of the Knights' game against Arizona in the Big 12 Tournament on Thursday. The exact nature of the issue was unclear, but Bol appeared to be struggling to catch his breath on the bench before checking back into the game. When a foul was called and play stopped, Bol dropped to the floor in the corner of the court, and members of the UCF staff spent several minutes with him before helping him walk unsteadily to the locker room.