Robert Guerrero unanimously outpointed Michael Katsidis on Saturday night to take the vacant WBA and WBO interim lightweight titles.

Guerrero, the former IBF featherweight and super-featherweight champion, had winning scores of 117-108, 118-106, 118-107 from the judges in the 12-round bout.

Guerrero solidified his position as one of the top lightweights in the world, outslugging Katsidis and leaving his face battered.

On the undercard, former IBF junior welterweight champion Paulie Malignaggi earned a lopsided unanimous decision over Jose Miguel Cotto, Nobuhiro Ishida stunned the previously unbeaten James Kirkland with a first- round knockout, and super lightweight prospect Danny Garcia upped his record to 21-0 with an unanimous decision over former lightweight champ Nate Campbell.

In the preliminary fights, 2008 Olympic gold medalist Rakhim Chakhkiev remained undefeated with a third- round knockout of Harvey Jolley, and Mikael Zewski also remained perfect with an unanimous decision over Clint Coronel.