Benjamin is believed to have sustained the concussion, which the team described as "mild," in the second quarter of Sunday's tie with the Cincinnati Bengals. The Panthers said Benjamin, who reportedly indicated he had a headache on Monday, will go through the league's concussion protocol.
Benjamin, who leads the team with 416 receiving yards this season, absorbed a hit from Bengals linebacker Vontaze Burfict that drew an unnecessary roughness penalty. He was cleared to return in the third quarter after undergoing concussion tests, according to a report from the Charlotte Observer.
It is not clear when Benjamin suffered the injury, but the report says that Rivera "assumes" the concussion happened on this play.
The Panthers (3-2) selected Benjamin in the first round of this year's draft out of Florida State.
- Chris Johnson