In the current study, variables grounded in social cognitive theory with athletes with disabilities were examined. Performance, training, resiliency, and thought control self-efficacy, and positive (PA) and negative (NA) affect were examined with wheelchair basketball athletes (N = 79). Consistent with social cognitive theory, weak to strong significant relationships among the four types of self-efficacy (rs = 0.22-0.78) and among self-efficacy and affect (rs = -0.40-0.29) were found. Basketball players who were efficacious in their ability to overcome training barriers were also confident in their basketball skills and efficacious in their ability to overcome ruminating distressing thoughts while simultaneously cultivating positive thoughts. Athletes with strong resiliency and thought control efficacy also reported more PA and less NA. Multiple regression analyses indicated that the four efficacies predicted 10 and 22% of the variance in PA and NA, respectively. (Contains 4 tables and 1 endnote.)