ROB GRONKOWSKI AND HIS 2 OTHER BROTHERS THAT PLAYED IN THE NFL. ROB PLAYED FOR THE COWBOYS AND DAN FOR THE BRONCOS.THIS PHOTO WAS  SIGNED AT ONE OF MY MANY SHOW SIGNING OR PRIVATE SIGNINGS THAT I HAVE DONE IN THE LAST 25 YEARS. ALL ITEMS WILL COME WITH A CERTIFICATE OF AUTHENTICITY. THE ONE YOU SEE IS THE ONE YOU GET. WILL PASS JSA/PSA OR ANY OTHER 3RD PARTY AUTHENICATION.