Beason signed a five-year, $52 million contract extension this offseason, and the Panthers are hopeful their defensive captain will be ready for the Sept. 11 opener at Arizona.
"We're still hoping for the opener," Rivera said. "It was to alleviate the discomfort. As he goes through the rehab portion of it these next few days, then we'll see how he is has he's running around."
The Associated Press contributed to this report.