The 6'6", 235-pound prospect is now the sixth defensive lineman to join Penn State's recruiting class of 2020.
Warren picked the Nittany Lions over Virginia Tech, Louisville, and Michigan, among others.
Bo Nickal added another accolade to his legendary Penn State career when he was named the 2019 Jesse Owens Big Ten Male Athlete of the Year.
Johnson is the ninth-ranked player in Virginia and the 33rd-best cornerback in the nation.
Washington is the third wide receiver to join Penn State's recruiting class of 2020.