Dhawan PS, et al. – This study was designed not only to assess the utility of the King–Devick (K–D) test in real time for identification of symptomatic concussion in youth athletes but also to determine if similar impairment (subclinical concussion) exists in youth athletes without an obvious head injury or symptoms. Findings revealed that rapid number naming using the K–D test accurately identified real–time, symptomatic concussion in youth athletes. However, scores in concussed players could remain abnormal over time. The outcomes suggested that athletes should undergo preseason and postseason K–D testing, with additional evaluation real time to inform the assessment of suspected concussion.