An unbeaten boxing prospect scored a brutal knockout when he left his opponent motionless on the canvas

• Pierce O Leary scored one of the most devastating knockouts of the year.
• The Dublin boxer fought Friday at an MTK Global event in England.
• Watch the finish right here.

An unbeaten boxing prospect scored a brutal knockout when he left his opponent motionless on the canvas at an MTK Global event Friday in Bolton, England.

Dublin super lightweight Pierce O'Leary was fighting Jan Marsalek, a puncher from the Czech Republic, and pulled off the most sensational win of his fledgling career when he finished his opponent in the second round.

Commanding the middle of the ring, O'Leary threw an uppercut at Marsalek's midsection and waited for the visiting fighter to throw a power punch before countering one of his own.

It was a well-timed left, landing with such precision on Marsalek's chin, that it instantly dropped him awkwardly to the floor.

As O'Leary nonchalantly celebrated the one-punch finish, Marsalek lay face-down on the ground.

Watch the slam dunk knockout right here:

The victory advanced O'Leary's pro boxing record to seven wins with three knockouts against no defeats.

Elsewhere on the card, Ricardo Sandoval upset Jay Harris, Paul Butler defeated Willibaldo Garcia Perez, and Gary Cully continued his undefeated run with a win over Viorel Simion.