© 2017 Human Kinetics, Inc. The use of rational emotive behavior therapy (REBT) in sport psychology has received little attention in research to date, but is steadily growing. Therefore, to further add to the building body of research, this study examines the efficacy of REBT (comprising five counseling sessions, and four homework assignments) in decreasing self-reported irrational beliefs, and increasing self-reported resilient qualities in five elite squash players from Malaysia. The study uses a single-case multiple-baseline across-participants design. Visual and graphical analyses revealed that REBT reduced self-reported irrational beliefs significantly in all athletes, and raised self-reported resilient qualities significantly in some ...