Las Vegas Raiders wide receiver Keelan Doss (18) makes a catch against the Seattle Seahawks during the first half of an NFL preseason football game, Saturday, Aug. 14, 2021, in Las Vegas. (AP Photo/Rick Scuteri)

FILE - Fans arrive at the Louisiana Superdome before an NFL football game between the New Orleans Saints and the New York Giants in New Orleans, in this Sunday, Oct. 18, 2009, file photo. Amid public and political scrutiny, the New Orleans Saints have adopted a new refund policy allowing fans to relinquish their season tickets and get their money back. (AP Photo/Patrick Semansky, File)

Student Rose Jean-Mary, 19, receives a shot of the Pfizer COVID-19 vaccination from registered nurse Isabel Ruiz, right, at St. Thomas University, Friday, Aug. 20, 2021, in Miami. The university offered a pop-up vaccination site for students on move-in day in preparation for the first day of school August 23. (AP Photo/Lynne Sladky)

FILE - In this July 31, 2021file photo Las Vegas Raiders fans watch the team during an NFL football practice in Henderson, Nev. Vaccine verification is becoming a coronavirus fighting front in Nevada. Las Vegas' biggest trade conference on Tuesday, Aug. 17, 2021, followed the NFL's Las Vegas Raiders in announcing they'll require attendees to prove they've gotten a COVID-19 inoculation. (AP Photo/David Becker, File)

From left, Stephen Lee, Adrianne Tong and Audrey Tong, wait to have their vaccination records checked before entering the Waterbar restaurant Friday, Aug. 20, 2021, in San Francisco. San Francisco became the first major city in the nation to require proof of full vaccination against COVID-19 on Friday for people dining inside restaurants, working out in gyms or attending indoor concerts. (AP Photo/Eric Risberg)

Las Vegas Raiders running back B.J. Emmons is tackled by the Seattle Seahawks during the second half of an NFL preseason football game, Saturday, Aug. 14, 2021, in Las Vegas. (AP Photo/Rick Scuteri)