Diehl suffered an MCL injury in Sunday's win over Tampa Bay. The extent of the injury is unknown at this point.
Bradshaw underwent X-rays on his neck after exiting in the second quarter against the Bucs. His status for Thursday's road game against the Carolina Panthers is up in the air.
Hixon also left Sunday's game in the first quarter with a concussion. It would be very unlikely for a concussed player to be cleared for contact in four days under the new NFL protocols, which require approval both from the team doctor and an independent physician.
Nicks was likely resting his surgically-repaired right foot on Tuesday. He said after a breakout performance Sunday (10 catches, 199 yards) that he'd be fine.
The Giants, of course, don't have much time for players to recover from injuries. They leave for Charlotte on Wednesday.
The Giants' only full practice of the week was Tuesday; they will likely go through a walk-through on Wednesday before leaving for Charlotte.
The team is hopeful that Amukamara, out since Aug. 24 with a high ankle sprain, can take the field Thursday. We will have more injury information after speaking with coach Tom Coughlin this afternoon.