Medical research and player advocacy have driven changes in the way head injuries are handled. The NFL has made adjustments to identify, manage, and prevent these injuries over time. Researchers are still discussing how effective these changes have been. A personal injury law firm has examined the evolution of concussion protocols and their impact on player health.

Further details on the changes and their implications are available. The league's approach to head injuries has undergone measurable adjustments.

The effectiveness of these changes is still being debated by researchers.