The NFL has a concussion and head injury issue. Many former players are suing them for not dealing with the risks and treatments when they were players.
What is the issue
It comes down to three things:
Prevention – Did the NFL do as much as they could to prevent concussions?
Treatment – Did the NFL standardize a treatment protocol?
Communication – Did the NFL know what was happening and communicate to the players?
How can technology prevent concussions
The US Army has been using an electronic sensor mounted in helmets for 5 years or so. Called the Headborne Energy Analysis and Diagnostic Systems it determines the force of an impact and wirelessly transmits a warning. Newer models allow for data to be gathered over time and downloaded so medical professionals can determine issues.