He didn't have a history of concussions so please keep the uninformed guessing to yourself.
The guy was a coward. Plain and simple.
Speaking of being uninformed, you should look in the mirror.
On May 2, 2012, Seau was found dead by his girlfriend at his home in Oceanside, California, with a gunshot wound to the chest that was ruled a suicide by the San Diego County medical examiner's office. Seau had no prior reported history of concussions, but his ex-wife said he did sustain concussions during his career. "He always bounced back and kept on playing," Gina Seau said.
"He's a warrior. That didn't stop him." Seau's family decided to allow researchers to study his brain for possible damage due to chronic traumatic encephalopathy (CTE), a condition traced to concussion-related brain damage with depression as a symptom.
Research candidates included the Center for the Study of Traumatic Encephalopathy of Boston University.http://en.wikipedia.org/wiki/Junior_Seau
The guy had a history of covering up his pain. You just don't like him because he didn't play in the SEC.