NFL's Marshawn Kneeland had CTE at 24. Alarming statistic shows that's not rare

Researchers Confirm Dallas Cowboys' Marshawn Kneeland Had Stage 1 CTE at Time of Death at Age 24

Researchers have determined that Dallas Cowboys player Marshawn Kneeland had Stage 1 CTE when he died by suicide at age 24. Kneeland, a seco

Former Dallas Cowboys star Marshawn Kneeland diagnosed with CTE eight months after death by suicide

Former Dallas Cowboys defensive end Kneeland had early stage CTE at time of death

Late Cowboys' player Kneeland diagnosed with CTE

Former Dallas Cowboys defensive end Kneeland had early stage CTE at time of death

Donte Whitner suggests ex-teammate C.J. Spillman may have answers about Aldon Smith's death

Former NFL defensive end Aldon Smith died at age 36, and his family has hired lawyers to investigate. Former teammate Donte Whitner revealed