Newton, Peterson, Bell and Gurley among unsigned big names

FILE - In this Nov. 22, 2020, file photo, Kansas City Chiefs running back Le'Veon Bell (26) carries the ball against the Las Vegas Raiders during the first half of an NFL football game in Las Vegas. Just a few years ago, Bell was arguably the best all-around running back in the league as a do-it-all playmaking force for Pittsburgh. Kansas City signed him and he wasn't much of a factor; he was active but didn't play in the Super Bowl. (AP Photo/Isaac Brekken, File)

FILE - New England Patriots quarterback Cam Newton (1) is shown during the first half of an NFL preseason football game against the New York Giants in East Rutherford, N.J., in this Sunday, Aug. 29, 2021, file photo. The Patriots released quarterback Cam Newton on Tuesday, Aug. 31, 2021, clearing the way for rookie Mac Jones to open the season as New England's quarterback, according to a person with knowledge of the move. The person spoke to the Associated Press on condition of anonymity because the decision has not been announced. (AP Photo/Noah K. Murray, File)

FILE - In this Dec. 20, 2020, file photo, Detroit Lions running back Adrian Peterson runs against the Tennessee Titans during the first half of an NFL football game in Nashville, Tenn. The fifth-leading rusher in NFL history is 36, but told SportsTalk 790 in Houston in July that he's still aiming to play at least another season. (AP Photo/Wade Payne, File)

FILE- In this Oct. 11, 2020, file photo, Atlanta Falcons running back Todd Gurley (21) runs against the Carolina Panthers during the first half of an NFL football game in Atlanta. Gurley signed with Atlanta last year and showed only flashes of his previous dynamic self, running for a career-low 678 yards while sharing the backfield with Brian Hill and Ito Smith. (AP Photo/John Bazemore, File)