Eight days after he was hit on a legal pick during the Raiders’ two-point conversion, Bears safety Jaquan Brisker was put back in concussion protocol Monday.

He was cleared from concussion protocol on Oct. 22 and 23 by an independent neurologist, coach Matt Eberflus said. He then reported a fever Tuesday that lasted three days. He returned to Halas Hall Friday but didn’t feel well. He didn’t practice all week or travel to Los Angeles because of what the Bears called an illness.

The illness lifted Sunday but Brisker still didn’t feel right, so the Bears put him through concussion testing Monday morning.

“I’ve never had that happen before,” Eberflus said. “But he got ill during that process and then when we was done being ill he still had the symptoms.”

Brisker was taken off the field twice by an independent spotter during last year’s game against the Falcons but wasn’t diagnosed with a concussion until after the game. He missed three weeks — two games and the bye — before returning to face the Eagles.