The Cardinals placed Alford (undisclosed) on the reserve/COVID-19 list Thursday, Darren Urban of the team's official site reports.
Alford now looks unlikely for Saturday's preseason finale against the Saints, but he will have over two weeks to gain clearance ahead of the regular-season opener versus the Titans on Sept. 12. Until the veteran cornerback fully clears the league's COVID-19 protocols, however, he will have to remain away from team facilities.