Marshawn Kneeland’s death highlights the importance of mental health resources for NFL players  CTV NewsDallas Cowboys defensive end Marshawn Kneeland dies at age of 24  The GuardianMarshawn Kneeland: Dallas Cowboys quarterback Dak Prescott says players ‘hurting’ following death  BBCCowboys’ Kneeland dies in apparent suicide at 24  ESPNMarshawn Kneeland Texted His Family ‘Goodbye’ Before His Death, Police Dispatch Reveals  People.com