The 26-year-old Crawford,24-0-(17 ),who was fighting in front of his hometown crowd, was making the first defence of the title he won from Scotland’s Ricky Burns back in March .
Gamboa, a former Olympic champion, lost for the first time and drops to 23-1-(16).
Although Gamboa boasted a significant physical advantage in reach, Crawford looked pretty much in control and knocked Gamboa down in the fifth by virtue of a left hook to the side of the head.
However, Crawford did not have everything his own way as Gamboa landed a series of heavy punches shots in the third, that got Crawford’s attention .
In the co-main event, WBO No. 1 middleweight Matt Korobov,24-0,scored a unanimous decision win over Jose Uzcatequi for WBO intercontinental title.
Korobov knocked Uzcatequi down twice in the fifth round and again with a body blow in the ninth.
vacant NABF welterweight title Mikael Zewski w ko 4 Prince Doku
bantamweight Johnny Determan nc 3 Ernie Marquez
featherweight Vic Pasillas w pts 6 Jiovany Fuentes
lightweight Casey Ramos w pts 6 Guillermo Sanchez
featherweight Bernard Davis w pts 4 Heath Cline
junior middlewieght Cody Crowley w ko 2 Ronnie Peterson