Rivera said Newton, who hasn't played since Week 2 because of a foot sprain, will continue working on the side and with the trainers during practice.
"Cam's going to continue his rehab," Rivera said. "... We're not putting any pressure on Cam. He's done a great job doing the things that we've asked of him. He's gone above and beyond as far as working with our quarterbacks and helping them along the way."
After losing its first two games of the season with its hobbling veteran, Carolina has won four straight with Allen under center. The second-year backup has completed 65.6 percent of his passes and thrown seven touchdowns with no interceptions. The Panthers are averaging 31.2 points with Allen starting.
"The more he plays, the more comfortable he gets, the more his confidence builds," Rivera said. "You see good, quick decisions, you see quick feet. And that's been huge and probably the one thing I appreciate -- knock on wood -- is that he's learning to protect the ball better."