The current study of US intercollegiate athletes (n = 1066) involved in multiple sports investigated relationships among moral (moral reasoning maturity, moral value evaluation [MVE], and moral identity), contesting (partnership and war orientations) and behavioral (prosocial and antisocial) variables in sport. Among other relationships, results demonstrated that prosocial behavior was positively correlated with moral reasoning maturity, higher appreciation of moral values, moral identity and a partnership contesting orientation. In contrast, antisocial behavior was negative correlated with moral reasoning maturity, MVE, moral identity and a partnership orientation. In addition, antisocial behavior was positively correlated with a war contesting orientation. Regression analyses demonstrated that prosocial behavior was best predicted by the partnership contesting orientation and moral identity; antisocial behavior was best predicted by the war orientation followed closely by moral identity. Results are discussed in relation to Kohlbergian moral theory and contesting theory.