Thornton (undisclosed) didn't practice Monday, Sam Warren of The Athletic reports.
Per Levi Damien of USA Today, Thornton has been missing from practice for the past of couple weeks and has yet to play this preseason. When he's able to return,Thornton will look to reestablish his slotting in a Raiders WR corps that also includes Tre Tucker, Jalen Nailor, Jack Bech and Malik Benson.