Sideline management of a suspected mild head injury includes postural control assessments typically performed shortly after exercise. The purpose of this study was to evaluate the effects of fatigue on postural control in healthy college-aged athletes using forceplate measures and the Balance Errors Scoring System (BESS). Post exercise recovery of postural control measures were also observed following each exercise protocol at specific time intervals. Thirty-six Division I collegiate athletes participated in this study. Statistical analysis revealed a significant decrease in postural control assessed immediately after an anaerobic and aerobic exercise protocol performed to fatigue (p < 0.001). Postural control deficits from fatigue returned to baseline between eight and thirteen minutes following each exercise protocol. Administering the BESS immediately following exercise may yield false-positive findings due to the effect from fatigue. Athletic trainers and clinicians should be aware of the impact of fatigue on postural control and the fatigue recovery time course when determining an appropriate time to administer sideline assessments of postural control following a suspected mild head injury.