We suggest that expanded use of behavioral assessment strategies in sports by researchers and practitioners will be beneficial for researchers, practitioners, athletes, and coaches. Behavioral assessment involves the collection and analysis of information and data in order to identify and describe target behaviors, identify possible causes of the behaviors, select appropriate treatment strategies to modify the behaviors, and evaluate treatment outcomes. In this paper, we summarize characteristics of traditional approaches to assessment in sport psychology, describe differences between behavioral assessment and traditional assessment, examine components of behavioral assessment for sport psychology practitioners and researchers, and discuss future directions in behavioral assessment in sport psychology.