The Baltimore Ravens experienced another outbreak of COVID-19 on Monday, providing an additional burden for a team that’s trending downward following a 5-1 start.

Coach John Harbaugh said running backs Mark Ingram and J.K. Dobbins have tested positive for COVID-19, and injured defensive tackle Brandon Williams will be placed in quarantine for five days.

All three were placed on the reserve/COVID-19 list.

With Ingram and Dobbins out for Thursday night’s game at Pittsburgh, seldom-used Justice Hill will join Gus Edwards in the Baltimore backfield. Dobbins ran for 70 yards and a touchdown on 15 carries and Ingram gained 2 yards on two attempts Sunday in a 30-24 overtime loss to Tennessee.

The Ravens reopened their training facility Monday afternoon after being closed earlier in the day. This is the second time the Ravens have been impacted by the coronavirus, though Harbaugh insisted that the players and the staff followed protocol before and during the game against the Titans.

“That’s probably the thing that gives us a chance to play this game on Thursday night, guys doing a great job of that here in the building and at the game,” Harbaugh said.

Cornerback Marlon Humphrey missed the Nov. 8 game against Indianapolis after a positive test, and several players spent that week on the reserve/COVID-19 list.

It’s been a rough month for Baltimore (6-4). The Ravens launched November with a home loss against the Steelers, a game in which 2019 All-Pro left tackle Ronnie Stanley sustained a season-ending ankle injury.

Baltimore also lost tight end Nick Boyle (knee) for the season.