Researchers have diagnosed former NFL receiver Vincent Jackson as suffering from stage 2 chronic traumatic encephalopathy.

FILE - In this Oct. 5, 2014, file photo, Tampa Bay Buccaneers wide receiver Vincent Jackson (83) runs with the ball in the second half of an NFL football game against the New Orleans Saints in New Orleans. Florida authorities are looking into the death of former Buccaneers player Jackson, who was found dead Monday, Feb. 15, 2021, at a Florida hotel room. (AP Photo/Bill Haber, File)BRANDON, Fla. – Former NFL wide receiver Vincent Jackson was found dead Monday at a Florida hotel room, days after authorities spoke with him as part of a welfare check, according to the Hillsborough County Sheriff’s Office. The son of military parents, Jackson founded the Jackson In Action 83 Foundation, a nonprofit to support military families. The Chargers, now based in Los Angeles, said Jackson was “gone too soon.”“We are shocked and deeply saddened by news of Vincent Jackson's sudden passing.