On 5 October 2008, Gamboa stepped up in class and fought Marcos Ramirez, a Kansas City featherweight in Temecula, California. Gamboa exhibited amazing hand speed and quick combination punching in the first round before he was dropped by Ramirez. Gamboa quickly came to his feet and resumed fighting until the bell rang to signify the end of the round. In the second round, Gamboa picked up where he left off and knocked Ramirez down with a fast right uppercut, followed by another combination. Ramirez let the referee administer the eight count before rising to his feet. Gamboa then finished the fight by pressuring Ramirez into the ropes and landing a left hook to the body, followed by a right uppercut to the jaw. Gamboa's next fight took place at Buffalo Bill's Star Arena on 9 January 2009 against Roger Gonzalez. Gamboa used quick combinations from the beginning of the third round to relentlessly attack Gonzalez. Gamboa began his assault after going down during the second round, after absorbing a sneaky right hand by Gonzalez. The referee halted the one-sided bout with 48 seconds remaining after Gonzalez sustained a barrage of punches to the head. Gamboa led 89–82 on one judge's scorecard and 89–83 on the other two judges' cards through nine rounds.