The NFL will look into why Carolina Panthers quarterback Cam Newton on Thursday declined to speak to media, league spokesman Brian McCarthy told ESPN.

Team spokesperson Steven Drummond said the 2015 NFL MVP did not give a reason. Coach Ron Rivera also was unaware of why his quarterback did not participate.

"I just found out,'' Rivera said. "I thought he had a press conference today, but apparently not.''

Star players are required to be available to the media during the week while in season.

Newton, until Thursday, had participated in every required media opportunity the past two weeks since he made light of a football question from Charlotte Observer reporter Jourdan Rodrigue earlier this month.

Rodrigue took time off after the incident and was not at Newton's other availabilities. She returned to the beat for the first time on Wednesday, when Newton normally holds his weekly news conference. He also did not speak that day.

Newton was at practice on Thursday and sat in front of his locker for more than 10 minutes playing loud music during the media open locker room session.