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