Carolina Panthers Cam Newton dances in the outfield during his charity kickball tournament in Charlotte, N.C., Friday, May 10, 2019. Both Panthers QBs will be action Friday. Meanwhile rookie draft pick QB Will Grier was throwing footballs for the first time as Carolina opens rookie minicamp on the team's practice fields outside the stadium. (AP Photo/Chuck Burton)

Carolina Panthers Cam Newton, right, celebrates as participants sing "Happy Birthday" during his charity kickball tournament in Charlotte, N.C., Friday, May 10, 2019. Both Panthers QBs will be action Friday. Cam Newton will be on the field at Bank of America Stadium throwing balls _ kickballs, that is _ as part of his annual Kicking it with Cam Kickball Tournament. Meanwhile rookie draft pick QB Will Grier will throwing footballs for the first time as Carolina opens rookie minicamp on the team's practice fields outside the stadium. (AP Photo/Chuck Burton)

Carolina Panthers Cam Newton, right, signs an autograph during his charity kickball tournament in Charlotte, N.C., Friday, May 10, 2019. (AP Photo/Chuck Burton)

Carolina Panthers head coach Ron Rivera, right, and general manager Marty Hurney, left, watch practice during the NFL football team's rookie camp in Charlotte, N.C., Friday, May 10, 2019. (AP Photo/Chuck Burton)

Carolina Panthers Cam Newton takes a selfie with fans during his charity kickball tournament in Charlotte, N.C., Friday, May 10, 2019. (AP Photo/Chuck Burton)

Carolina Panthers Cam Newton celebrates an out during his charity kickball tournament in Charlotte, N.C., Friday, May 10, 2019. Both Panthers QBs will be action Friday. Meanwhile rookie draft pick QB Will Grier was throwing footballs for the first time as Carolina opens rookie minicamp on the team's practice fields outside the stadium. (AP Photo/Chuck Burton)

Carolina Panthers rookie quarterback Will Grier (3) looks to pass during the NFL football team's rookie camp in Charlotte, N.C., Friday, May 10, 2019. (AP Photo/Chuck Burton)

Carolina Panthers rookie quarterback Will Grier (3) stands with head coach Ron Rivera, left, during the NFL football team's rookie camp in Charlotte, N.C., Friday, May 10, 2019. (AP Photo/Chuck Burton)

Carolina Panthers rookie quarterback Will Grier (3) throws a pass during the NFL football team's rookie camp in Charlotte, N.C., Friday, May 10, 2019. (AP Photo/Chuck Burton)

Carolina Panthers Cam Newton, right, jokes with a teammate during his charity kickball tournament in Charlotte, N.C., Friday, May 10, 2019. Both Panthers QBs will be action Friday. Cam Newton will be on the field at Bank of America Stadium throwing balls _ kickballs, that is _ as part of his annual Kicking it with Cam Kickball Tournament. Meanwhile rookie draft pick QB Will Grier will throwing footballs for the first time as Carolina opens rookie minicamp on the team's practice fields outside the stadium. (AP Photo/Chuck Burton)

Carolina Panthers rookie quarterback Will Grier (3) throws a pass during the NFL football team's rookie camp in Charlotte, N.C., Friday, May 10, 2019. (AP Photo/Chuck Burton)