Ricky Simon and Javid Basharat locked horns at UFC Fight Night 252 in the preliminary card on Saturday at the Climate Pledge Arena in Seattle, Washington.
But the bantamweight fight didn't last long as Simon, 32, blasted Basharat, 29, in the face and immediately floored him in the canvas during the first round.
The ref immediately stopped the fight and Simon was declared the winner via knockout.
A UFC fighter suffered perhaps the most horrific knockout of the year after sustaining a devastating right hand.
The camera then caught the Afghan-born English fighter looking motionless with his eyes glaring open after the horrific attack.
