Junior Seau is the Kurt Cobain of NFL linebackers.
Both were born on the West side.
The majority of both of their careers unraveled on the West side.
Both of them committed suicide via self-inflicted gunshot wounds.
Both of them were well-known for the passion they put into their professions.
Both of them are widely known as being the most influential at their professions.
Both were highly accomplished at their professions.
Both of them had psychiatric issues (depression), which presumably was a factor in their decision to take their own lives.
Both of them had physical ailments that went hand-in-hand with their professions which were presumably factors that led to their decision(s) to take their own lives. With Seau it was, chronic traumatic encephalopathy from being consistently and repeatedly hit hard in his years playing football. With Cobain, it was: chronic bronchitis and a debilitating stomach condition, potentially brought on by drug abuse which is very consistent with musicians.
Both were seemingly respected by those they worked with. Their "co-workers" were seemingly heartbroken after they took their own lives.
Both had domestic issues with their partners. Seau's girlfriend turned him into the police after an alleged domestic "incident." Courtney and Kurt's relationship had been described as "tumultuous." Some fans even went as far as blaming Courtney for Kurt's suicide, some claiming he wouldn't have done it if it were not for her, some going as far as stating that they believe Courtney actually pulled the trigger (not saying I believe this).
Both allegedly had substance abuse issues to a certain extent.