Carolina Panthers quarterback Cam Newton arrives at the San Jose International Airport on Sunday, January 31, 2016, in San Jose, CA. (Perry Knotts/NFL)

Carolina Panthers quarterback Cam Newton walks out of a news conference after an NFL football game against the Los Angeles Rams, Sunday, Nov. 6, 2016, in Los Angeles. The Panthers won 13-10. (AP Photo/Jae C. Hong)

Carolina Panthers' Cam Newton enters the interview room after an NFL football game against the Arizona Cardinals in Charlotte, N.C., Sunday, Oct. 30, 2016. (AP Photo/Bob Leverone)

Carolina Panthers' Cam Newton smiles at reporters' questions following an NFL football game against the San Diego Chargers in Charlotte, N.C., Sunday, Dec. 11, 2016. The Panthers won 28-16. (AP Photo/Bob Leverone)

Carolina Panthers quarterback Cam Newton wears a hat in honor of Craig Sager as he arrives for a post game press conference after a NFL football game against the Washington Redskins in Landover, Md., Monday, Dec. 19, 2016. The Panthers defeated the Redskins 26-15. (AP Photo/Patrick Semansky)

Carolina Panthers' Cam Newton speaks to the media after an NFL football game against the Minnesota Vikings in Charlotte, N.C., Sunday, Sept. 25, 2016. The Vikings won 22-10. (AP Photo/Bob Leverone)

Carolina Panthers' Cam Newton talks to the media after an NFL football game against the San Francisco 49ers in Charlotte, N.C., Sunday, Sept. 18, 2016. The Panthers won 46-27. (AP Photo/Bob Leverone)

Carolina Panthers' Cam Newton speaks to the media after a preseason NFL football game against the New England Patriots in Charlotte, N.C., Friday, Aug. 26, 2016. (AP Photo/Bob Leverone)

Carolina Panthers quarterback Cam Newton participates in a post game press conference after an NFL football game against the New Orleans Saints in New Orleans, Sunday, Oct. 16, 2016. (AP Photo/Butch Dill)

Carolina Panthers' Cam Newton responds during a press conference at the NFL football team's training camp in Spartanburg, S.C., Friday, July 29, 2016. (AP Photo/Gerry Broome)