What is the most common cause for a traumatic brain injury?

The most common cause of a traumatic brain injury is usually a vehicle accident. Having said that the list of situations that may result in a brain injury are quite extensive.

Head injuries may be sustained by being involved in:

auto crashes
motorcycle accidents
hit and run collisions
construction accidents
truck accidents
18-wheeler/commercial truck accidents
farming equipment accidents
oil rig accidents
soccer
football
baseball
boxing
assaults
falls
on-the job accidents
explosive blasts/other combat injuries