Given the high rates of gambling in the United States and the growing population of problem and pathological (disordered) gamblers, there is a need for effective interventions which will eliminate or reduce disordered gambling, or, at minimum, reduce harm resulting from disordered gambling. High-risk populations for development of disordered gambling include college students and online poker players. This study sought to develop and test a brief behavioral intervention for decreasing monetary loss, time spent gambling, and risky betting for college-aged self-identified problem gamblers who play online poker. This study included four participants in a multiple baseline across participants. Post-intervention, all participants gambled fewer days overall, and three of four participants lost less money overall. The fourth participant was never at a net monetary loss.