The sudden and unexpected death of Junior Seau yesterday has sparked debate over the effect concussion and head injuries actually have on NFL players. Ray Easterling, Dave Duerson, Terry Long and Andre Waters all committed suicide in recent years and Alex Karras, who now suffers dementia, is among over 100 ex players suing the NFL for not doing enough to protect them from head injuries. The link between brain injuries and violent behavior and suicides among NFL players is becoming more and more apparent. Just before Dave Duerson shot himself in the chest he texted his family asking them to have his brain used for NFL research. It is believed Seau also shot himself in the chest. Very sad indeed. RIP Seau.