Robbie Lawler KO’d Rory MacDonald at the 1 minute mark of the 5th round at UFC 189 to retain his UFC Welterweight title.  Lawler owned the first two rounds, but a head kick delivered by MacDonald in the 3rd, turned the tide.  MacDonald continued the assault thought the 4th round and had Lawler tired.  From the beating he took in the first two rounds, MacDonald had a badly bloodied nose.  That nose could not take any more punches in the 5th round after Lawler landed a clean shot to the face.

H/T to @BigCheeseLogan for the tweet and vid.