IRVINE, Calif., Feb. 20 -- Maybe the first time that Paul Karsky (Pictures) fought Fabio Costa (Pictures) back in November, a fight he lost due to a cut, he saw something in Costa's game that gave him the confidence to want to fight him again. Or maybe Costa just wanted a more decisive win.

Whatever the case was, in the rematch at the Irvine Marriott, Costa defeated Karsky with a rear-naked choke at 1:09 of the first round, giving Costa two victories over Karsky in just under a round combined for both fights.

Other results:
Denis Grachev def. Daniel McWilliams (Pictures) submission (guillotine choke) 0:47 R2*
Seth Dikun (Pictures) def. John Merkle TKO 0:39 R3
Jessica Pene (Pictures) def. Heather Basquil decision (unanimous) 3:00 3R
Andy Prudencio def. Luke Adams (Pictures) decision (split) 3:00 3R
Tyler Weathers (Pictures) def. Ernie Calma submission (rear-naked choke) 2:49 R1
Thor Skancke def. Raja Shippen (Pictures) decision (unanimous) 3:00 3R

*Sherdog.com incorrectly reported that Denis Grachev defeated Ismael Gonzalez.