Objective: To explore the protective factors against performance enhancing drug (PED) use in sport via a qualitative analysis of athletes' lifelong athletic careers. Method: Ten competitive athletes (M=5, F=5) representing five different sports (field hockey, boxing, football, triathlon, rugby league) were recruited through convenience sampling to undertake a semi-structured interview. Method: Verbatim transcripts were analyzed using an established three-stage coding process which identified the common themes through the narratives. Results: Personal and situational protective factors were identified in the athletes accounts. Personal factors included:(i) a strong moral stance against cheating; (ii) an identity beyond sport; (iii) self-control; and (iv) resilience to social group pressures. Secure attachments across the lifespan, which facilitated the promotion of moral decision making and assisted in the development of anti-doping attitudes, was collectively identified as a situational factor. When systemic factors, such as a pro-doping climate, came into play key attachments in the athletes' lives interplayed with personal factors to reduce the risk of doping. Conclusions: These findings offer insights into factors that protect against using PEDs in sport and further our understanding of the complex interaction between risk and protective factors at individual, psychosocial and societal levels among competitive athletes. As a complex behavior, doping in sport cannot be prevented by focusing on the individual athlete alone; contextual factors beyond the athlete's control also impact on this behavior. Thus, a paradigm shift beyond an athlete-centered approach to anti-doping is warranted.