Former football player and wrestler Chris Nowinski's quest to publicize recent findings about the often dire consequences of head concussions sustained by athletes in contact sports — injuries that have previously been considered momentary setbacks and ignored in the name of toughness and dedication to the team.
| Actor | Role |
|---|---|
| CChristopher NowinskiSelf | Self |
| AAlan SchwarzSelf | Self |
| KKeith PrimeauSelf | Self |
| RRobert Cantu, MDSelf | Self |
| AAnn McKeeSelf | Self |
| IIsaiah KacyvenskiSelf | Self |
| CCindy Parlow ConeSelf | Self |
| BBrendan ShanahanSelf | Self |
 Linda SánchezSelf | Self |