BEREA, Ohio (WJW)– Cleveland Browns quarterback Case Keenum tested positive for COVID-19, ESPN insider Adam Shefter reported on Thursday.

He was expected to start for Baker Mayfield, who previously tested positive. The Browns host the Raiders Saturday at 4:30 p.m., making it tougher to get the two negative tests required to play. While head coach Kevin Stefanski, who also tested positive, said he wouldn’t rule anyone out, it’s very unlikely Mayfield will be back in time.

On Thursday, the Browns elevated quarterback Nick Mullens from the practice squad, making him next in line to start against Las Vegas.

Mullens signed with the 49ers as an undrafted free agent, and was part of the practice squad in 2017 and 2018. In his NFL debut, he threw for 262 yards and three touchdowns in a win over the Cardinals. He remained a backup to Jimmy Garoppolo until late in the 2020 season. He’s been on the Browns practice squad since September.

Shefter reported four other defensive players also tested positive.

Here are Browns members on the COVID list as confirmed by the team:

  • HC Kevin Stefanski
  • Acting RB Coach Ryan Cordell
  • QB Baker Mayfield
  • WR Jarvis Landry
  • CB Troy Hill
  • DT Malik McDowell
  • DE Ifeadi Odenigbo
  • S John Johnson
  • TE Austin Hooper
  • OT Jedrick Wills
  • G Wyatt Teller
  • G Drew Forbes
  • DE Tak McKinley
  • WR Jojo Natson
  • S Ronnie Harrison

In non-COVID Browns news, running back Kareem Hunt is out with an ankle injury, and cornerback Greg Newsome and wide receiver Anthony Schwartz are both out with concussions. Tight end Harrison Bryant and defensive tackle Malik Jackson are listed as questionable.