Our study seeks to further investigate the phenomenon of single-sport specialization by surveying current HS, collegiate, and professional athletes. We hypothesized that more current HS students specialized to a single sport at an earlier age than current collegiate and professional athletes. Specifically, we sought to determine (1) the prevalence of single-sport specialization among the surveyed athletes, (2) the age of specialization for those athletes who specialized in a single sport as well as their rationale for specialization, and (3) if these athletes felt their decision to specialize in a single sport had resulted in injury. We believe that understanding the prevalence of single-sport specialization, as well as the age of specialization, will help physicians to better understand this current trend and to better counsel their patients and parents in order to mitigate or avoid the negative outcomes potentially associated with specialization, most notably injury.