The proliferation of projects using student teams has motivated researchers to examine factors that affect both team process and outcomes. This research introduces an individual difference variable found in the business environment that has not been examined in a classroom context. The lone wolf appears to play a role in how teams function and perform. Described by practitioners and academics, the lone wolf is identified by a preference to work alone, a dislike of group process and the ideas of others, and a proclivity to see others as less capable and effective. This study finds the lone wolf phenomenon among marketing students working in teams through self-ratings and the assessments of team members. Furthermore, the inclusion of lone wolves on teams is found to have a negative impact on student team performance. Implications of these findings and ideas for managing the team process when lone wolves are present are considered. (Contains 1 table.)