Holly Holm KO’d Ronda Rousey at 59 seconds of the second round at UFC 193 with a monster head kick. Holm dominated Rousey from the opening bell with fantastic boxing and ultimately kickboxing. Holm’s victory is easily the greatest upset in MMA history. To be honest, I thought she was going to be just another name to fall to Rousey. But, she was completely dominant and fought the perfect fight. Hats off. Enjoy the KO.