Introduction: Facing the increasingly competitive demand of sport and leisure job market, undergraduates’ ways of demonstrating their individual proactivity have become a critical factor on their future career success. Although previous research have identified the value of proactivity on personal career development, little attention has been cast in the fields of sport and leisure. Likewise, based on theoretical perspective of individual proactivity, how and when individual proactive dispositions and goal-driven motivations foster career planning is unclear. Drawing on proactive motivation model, this study examined the relations among proactive personality, future work self salience, and career planning of undergraduates of related majors. Methods: In order to reduce the problem of common method variance (CMV), the research adopted a time-lagged design to gather materials and information in three-phase surveys. Initially, the researcher enrolled 200 sports and leisure majoring college students in Taiwan. After pooling the three times data form respondents, the final valid sample consisted of 159 participants completing all measures. Results: Results indicated that proactive personality is positively associated with career planning through future work self salience. In addition, the finding of moderated-mediation model showed that proactive personality has a stronger positive association with future work self salience and thus career planning, especially when students possess higher levels of proactive personality. Conclusion: the current finding suggests that the tendency of sports and leisure college students’ proactive personality are both critical antecedent and moderating factor to future work self-salience and career planning. In other words, our study supports and highlights that high proactive personality is effective in contributing to college students’ goal setting and career planning, and thus provide insights and implications for students’ career development planning and counseling. Specifically, we suggest that practitioners in the field can establish as well as build up students’ proactivity with course design, clarifying their career direction and goals.