School-based substance use prevention programs are a common method to approaching drug use in youths. Project SOS is a single-session drug prevention program developed by police officers and delivered by elite junior hockey players to students in grades 6 and 7. The current study evaluates the effects of Project SOS at achieving its objectives of educating youths about the consequences and dangers of illicit drugs, and changing attitudes with respect to drug use. Results highlight some promising findings, although few significant differences were seen from pretest to posttest on key outcomes of interest. Recommendations for adapting the program using evidence-based strategies are provided.