Watch the brutal UFC "KO of the year"

Cody Garbrandt has just secured one of the most devastating knockouts you're likely ever to see.

In the co-main event at UFC 250, Garbrandt left every single person watching on in disbelief with a punch for the ages a split second before the buzzer to end the second round.

As he was backed up against the cage, Garbrandt loaded up his right hand from a mile back and landed it clean on the chin of Rafael Assuncao that turned his lights off immediately.

This article was first published on nzherald.co.nz and is republished here with permission