Scholars in sport psychology have called for research that “gives a voice” to marginalized groups, which would arguably include boxers (Fisher et al., 2003; Ryba and Wright, 2005; Simpson and Wrisberg, 2013). Boxers should have a pronounced self-control and self-efficacy (Lane, 2006; Yu et al., 2012). Thus, boxing is well suited for applied sport psychology interventions (Schinke, 2007); more emphasis should be put into research on the self-control and self-efficacy of boxers.