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Marcus Aureio won by armbar in just 16 seconds. (MMAweekly.com Photo)

UFC Fight Night 13 is underway in Broomfield, Colo., and the results are in for the preliminary fights.

Brazilian jiu-jitsu expert Marcus Aurelio won his fight in just 16 seconds, knocking opponent Ryan Roberts to the canvas and locking on an armbar for the win.

Armenian judo fighter Manny Gamburyan also won quickly, taking out Jeff Cox with a choke hold at 1:21 into the first round. Lightweight Clay Guida beat French fighter Samy Schiavo by TKO. Shiavo hurt Guida with kicks to the body but was quickly taken down by the wrestler, where he was mounted and beaten.

In other action, Australian George Sotiropolous defeated Roman Mitichyan by TKO in the second round.

UFC Fight Night 13 Prelim. Results
Wednesday, April 2 – Broomfield, Colo.

Marcus Aurelio def. Ryan Roberts by armbar at 0:16, R1
Manny Gamburyan def. Jeff Cox by choke at 1:21, R1
Clay Guida def. Samy Schiavo by TKO at 4:15, R1
George Sotiropoulos def. Roman Mitichyan by TKO at 2:24, R2
Anthony Johnson def. Tommy Speer by KO at 0:51, R1

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