Raiders coach Jon Gruden says Derek Carr is ‘on a mission’ to prove he is one of the NFL’s best quarterbacks | CBS Sports Headlines Raiders coach Jon Gruden says Derek Carr is ‘on a mission’ to prove he is one of the NFL’s best quarterbacks Carr is having a … Continue reading Raiders coach Jon Gruden says Derek Carr is ‘on a mission’ to prove he is one of the NFL’s best quarterbacks