The team is still hopeful Monroe will pass his baseline test Saturday and be cleared to play the following day at the New York Giants.
If Monroe can't play, the Jaguars would be without both starting tackles against defensive ends Osi Umenyiora and Justin Tuck. Right tackle Eben Britton was placed on injured reserve last month. Top backup Jordan Black is filling in for Britton, leaving undrafted rookie Kevin Haslem or inexperienced veteran Guy Whimper as potential options on the other side.
Monroe did not report concussion symptoms during Sunday's win against Cleveland. He worked out Monday, then complained of a headache and was diagnosed with a mild concussion.