Ex-NFL DB Stanley Wilson Jr. Dead At 40 After Collapsing At Mental Hospital

Stanley Wilson Jr. -- a former Detroit Lions cornerback and the son of ex-Bengals running back Stanley Wilson Sr. -- has died after collapsing at a mental hospital earlier this month ... TMZ Sports has learned.

Wilson Jr. had been in police custody following his vandalism arrest back in August ... but according to prosecutors, he was declared incompetent to stand trial and was transferred from county jail to the Metropolitan State Hospital in Los Angeles County on Feb. 1.

But, law enforcement sources tell us during intake at the medical facility -- which specializes in caring for those with mental health issues -- he collapsed and died.

Our sources say foul play is not suspected. Autopsy results are pending toxicology.

Wilson Jr. was just 40 years old.

The former defensive back was taken by the Lions in the third round of the 2005 NFL Draft ... and went on to play three seasons for the team -- before suffering a career-ending Achilles injury prior to the beginning of the 2008 season.

After his NFL career had concluded, Wilson found himself in trouble with the law multiple times.

In 2016, he was charged with attempted burglary after he was shot in the abdomen after he allegedly attempted to break into a home in Portland while completely nude. Months later, in 2017, he was arrested after he was accused of walking around a Portland neighborhood while naked. He was arrested a third time in 2017 after another alleged attempted break-in.

In August, he was arrested once again for allegedly breaking into a home and then taking a bath in an outdoor fountain after ransacking the place.

Wilson Jr. played in 32 games in his pro football career, logging eight pass breakups, a forced fumble and 87 total tackles.