May he get the help he needs

It could be substance abuse, since this seems way out of character for him.

Shadow_of_the_Dome brought up the possibility of CTE.

I think that's also a realistic possibility.

He took a lot of hits at BC and Pitt, which led to his being unable to finish out a single season at either place.

Even during his best season at BC (shortened 2020), he was getting hit way too often, especially on the blind side.

It could be a combination of both CTE and drug issues. He'll be undergoing drug and mental health screening, according to the articles out there.

I do sometimes wonder, how he would have turned out had he stayed, since he would have been the unquestioned starter for the 2021 season.

I'm surprised he couldn't find some type of more gainful employment, since he does have his bachelor's degree in economics from Boston College.