NFL: Miami Dolphins at New England Patriots

Seau is the cautionary tale of what football can do over the long run. The USC product became a Hall of Famer after 13 seasons with the Chargers, another three with the Dolphins, and then four more with the Patriots. He tragically committed suicide just three years after his retirement, and his brain later showed signs of CTE. (Greg M. Cooper-USA TODAY Sports)

Seau is the cautionary tale of what football can do over the long run. The USC product became a Hall of Famer after 13 seasons with the Chargers, another three with the Dolphins, and then four more with the Patriots. He tragically committed suicide just three years after his retirement, and his brain later showed signs of CTE. (Greg M. Cooper-USA TODAY Sports)