Ketlen Vieira stuns UFC contender Sara McMann with second-round submission

Vieira is 9-0, winning her last three UFC fights. 

Ketlen Vieira just stunned the UFC world.

In her third UFC fight, the bantamweight remained unbeaten by submitting contender Sara McMann early in the second round:

Vieira was in trouble in the first round, as McMann earned mount and pummeled on her opposition. Vieira was able to escape and nearly had a heel hook to end the round.

It's a stunning upset of McMann, who hoped to make her case for earning another title shot.

She had won her last three consecutive bouts heading into Saturday night. Vieira is 9-0, winning her last three UFC fights.