Rousey (8-0) and fellow undefeated Olympic medalist McMann (7-0) have been on a collision course since they entered the sport. The arena was on fire, and just in a little over a minute the fight was over.
Rousey landed a knee to the liver, and McMann dropped to the canvas. She was not defending herself when she dropped, and Herb Dean stopped the fight. It was the first time Rousey won with something other than the armbar, and it was still beautifully violent.
Here is a look at the first round recap.