Earlier this morning, reports of Chandler Jones being mysteriously hospitalized began surfacing, but there was no firm conclusion as to what led to the Pro Bowl Patriots defensive lineman’s admittance to the hospital.

Now, according to Christopher Gasper of the Boston Globe, we’ve learned that Jones’ hospitalization was due to a bad reaction with some synthetic marijuana–which is banned in the city of Boston, but still legal in certain Massachusetts cities–that he took. Though synthetic marijuana isn’t a banned NFL substance, breaking the law could carry a heavier weight concerning consequences for Jones, who was preparing to play in the Patriots Divisional Round playoff game with the Kansas City Chiefs this Saturday.

This year, Jones had a breakout season for the Patriots, logging 12.5 sacks and 31 tackles this season at defensive end. Jones practiced with the team on Monday.