The current study examined whether social problems accounted for the relation between reactive aggression and withdrawn/depressed symptoms in a sample of 147 children (54.4% male) ranging from 5 to 13 years of age (M = 8.22 years) who attended a community based after-school program. Findings suggested that indeed social problems mediated the link between reactive aggression and withdrawn/depressed symptoms, such that high levels of reactive aggression are associated with high levels of social problems, which in turn are associated with high levels of withdrawn/depressed symptoms. Findings suggest the need to target peer relationships in the prevention of subsequent negative emotions for children who exhibit high levels of reactive aggression.