Wait, wasn't Derek Carr supposed to thrive under Jon Gruden?

LONDON -- Derek Carr stood at the podium, talking and motioning solely with his right hand as his left shoulder looked frozen in place. The Oakland Raiders' $125 million quarterback kept his left hand in his pocket, almost as if to keep the arm and shoulder stationary, during his 11-minute media appearance.

Midway through the fourth quarter of Sunday's 27-3 loss to the Seattle Seahawks -- a game in which Carr was hit 10 times and sacked six times -- Carr was pounded to the Wembley Stadium pitch especially hard as Seattle's Jarran Reed drove Carr's left shoulder into the ground.

"Just a little bruise," Carr insisted. "I'll be all right."

Will he though?

Carr has looked a shell of his 2016 self,…