© 2018 Human Kinetics, Inc. Between 2001 and 2015, 3.4 million traumatic brain injury (TBI) occurrences in the U.S. were accounted for by sport participation. It is estimated between 12% and 60% of athletes delay seeking care after sustaining a concussion. Differences in sport-related concussion (SRC) reporting have been attributed to several different factors. Whereas prior research related to SRC reporting behavior focus on normative and competitive pressures to continue play, less attention is given to the interpersonal context in which reporting takes place. Grounded in attachment theory, this study investigated relationships between coach-athlete attachment and help-seeking behavior. Findings suggest that as coach-athlete anxiousness increases, not reporting increases. and as coach-athlete secureness increases, not reporting decreases. Logistic regression analyses indicate that secure coach attachment significantly predicts greater likelihood of SRC reporting. These findings underscore the important role coach-athlete relationships may have on care-seeking behaviors of student-athletes and can inform individual and group interventions promoting SRC reporting.