Training camp does not officially open for three days and already the Detroit Lions have a player on the reserve/COVID-19 list.
The Lions placed undrafted rookie offensive lineman Evan Heim on the COVID list Sunday.
More than half of the Lions' current 89-player roster and all of their assistant coaches are vaccinated, though Heim's vaccination status is unclear.
The NFL has two sets of rules currently in place for players and staff members who test positive for COVID-19. According to a memo obtained by NFL.com, vaccinated players players who test positive and are asymptomatic can return to practice after two negative tests 24 hours apart, while non-vaccinated players must isolate for 10 days following a positive test.