The Browns placed defensive end Joe Jackson on the COVID-19 reserve list Tuesday.
He joined defensive end Myles Garrett, fullback Andy Janovich and offensive lineman Chris Hubbard.
Jackson, in his second NFL season, has five tackles and a fumble recovery in three games. He hasn’t played since Week 4.
The Browns claimed him off waivers from the Cowboys on Sept. 6.
The Browns didn’t have any positive tests this season until a staff member Nov. 7 during the bye. Since then, Hubbard (Nov. 13), Janovich (Nov. 16) and Garrett (Friday) tested positive and haven’t played.
On Monday, coach Kevin Stefanski ruled out Garrett for Sunday’s game against the Jaguars in Jacksonville. Stefanski said it was too early to tell if Hubbard or Janovich would be available to play against the Jaguars.
Browns headquarters was open Tuesday afternoon after temporarily closing, and the team was scheduled to begin the practice week Wednesday.
End Cameron Malveaux will likely be activated from the practice squad again this week. He was elevated from the practice squad, got the nod over Jackson and made his Browns debut in the 22-17 win over the Eagles on Sunday. He forced a fumble in the first quarter at the Cleveland 4-yard line, with safety Karl Joseph recovering to keep the game scoreless.
The Jaguars have COVID issues, as well.
NFL Network reported the entire defensive coaching staff was out of the building Tuesday — when the game plans are made — because of COVID-19 protocols. Contact tracing was underway.