The purpose of this study was to explain the process of how a sport team could induce consumers to engage in proenvironmental behavior. Building on Kelman's (1958, 1961, 2006) internalization perspective, this study demonstrated that positive environmental practices by a team increased consumer internalization of the team's values. In turn, this increased internalization mediated the relationship between environmental practices and proenvironmental behavior measured by two behavioral intentions: intention to support the team's environmental initiative and intention to engage in proenvironmental behavior in daily life. The results of this study contribute to the literature by highlighting the significant role of internalization. This research further provides a significant insight into the social impacts of sport organizations.