There has always been an intrigue to watching an undefeated fighter compete. It is more uncommon in MMA than in boxing to see a fighter go far into their career undefeated. Unlike boxing where you see top boxers get to 20 something and O before they fight top ranked opponents, high level MMA fighters often fight each other early in their careers. It’s very rare to see an MMA fighter go 20-0 for this reason.