The Jaguars signed McDermott to the active roster Saturday.
The Jaguars placed McDermott on the practice squad COVID-19 list Saturday, Tom Pelissero of NFL Network reports.
The Jaguars waived McDermott (ankle) on Friday, Greg Auman of The Athletic reports.
McDermott (ankle) went unclaimed on waivers and reverted to the Jaguars' injured reserve, per the NFL's official transaction log.
McDermott has been ruled out for the remainder of Thursday's preseason contest with Atlanta due to an ankle injury, John Oehser of the Jaguars' official site reports.
McDermott suffered an ankle injury in Saturday's preseason matchup against Atlanta and is questionable to return, Tad Dickman of the Jaguars' official site reports.
McDermott signed a futures contract with Jacksonville on Monday.