A recent study of NCAA Division I college football players looked at rates of concussions, the frequency of concussion-related symptoms, and return to play rates while experiencing symptoms consistent with a concussion during a single season. While there was no difference in the number of diagnosed concussions among athletes at different positions, there were great differences in undiagnosed concussions and “dings.” Offensive linemen reported significantly more undiagnosed concussions and “dings” during the football season than all other position groups. Players at those positions also reported returning to play despite having symptoms significantly more often than all other positions except running backs.
Source: Journal of Neurotrauma, March 2015