The list was created for a player who either tests positive for COVID-19 or who has been in close contact with an infected person or persons.
Johnson says in a statement that he tested positive, but feels "strong and ready to go."
Nathan Gerry and Jordan Mailata have also been placed on the Reserve/COVID-19 list.
"I feel extremely safe.. but we can't control everything," said coach Doug Pederson on Tuesday responding to a COVID-19 outbreak involving the Miami Marlins.
Johnson will quarantine and follow protocols until he can return to Eagles training camp.