Carolina Panthers quarterback Sam Darnold runs a drill during NFL football practice in Charlotte, N.C., Tuesday, June 15, 2021. (AP Photo/Nell Redmond)

Carolina Panthers head coach Matt Rhule watch from the sidelines during NFL football practice in Charlotte, N.C., Tuesday, June 15, 2021. (AP Photo/Nell Redmond)

Carolina Panthers running back Christian McCaffrey carries the football during NFL football practice in Charlotte, N.C., Tuesday, June 15, 2021. (AP Photo/Nell Redmond)

Carolina Panthers quarterback Sam Darnold prepares to throw during NFL football practice in Charlotte, N.C., Tuesday, June 15, 2021. (AP Photo/Nell Redmond)

Carolina Panthers quarterback Sam Darnold (14) throws a pass as quarterback PJ Walker (6) looks on during NFL football practice in Charlotte, N.C., Tuesday, June 15, 2021. (AP Photo/Nell Redmond)

Carolina Panthers quarterback Sam Darnold throws a pass during NFL football practice in Charlotte, N.C., Tuesday, June 15, 2021. (AP Photo/Nell Redmond)