Watch: Marquardt gets KO'd by vicious left from Santos
J. Kopaloff / Getty Images Sport / Getty
Thiago Santos now has seven first round finishes to his name.
The Brazilian middleweight, who finished off Nate Marquardt in a dominant performance, ended the bout with a vicious left shot just behind the ear.
Santos was on Marquardt from the opening bell, knocking him down early and staying on the attack until he could finish the fight.