In sport, the small group is represented by the team—a network of people who possess a collective identity, have a sense of shared purposes or objectives, use structured patterns of interaction and modes of communication, exhibit personal and task interdependence, and reciprocate interpersonal attraction. This paper discusses research pertaining to the small group in sport within a general systems framework comprised of inputs (personal and environmental factors), throughputs (group interaction and integration processes), and outputs (achievement factors and personal-social factors).