Bradford was named the NFC Offensive Player of the Week for his performance Monday in the opener against New Orleans. He showed no signs of trouble during the game.
ESPN reported that Bradford felt pain and swelling in his left knee that has twice been surgically repaired. The network says he had an MRI test Tuesday that revealed no specific damage. Zimmer declined to confirm the MRI.
Two defensive starters were also listed as questionable: cornerback Xavier Rhodes (hip) and linebacker Anthony Barr (hamstring).