So even though he can not file a claim under ADA, would it not be reasonable to ask the senior manager for reconsideration? If they require it, a note from his physician, perhaps, or a change in work detail? He was working with the carts, bringing in the shopping carts from the parking lot to the store, when his problems began. He asked to work at the check-out lines bagging groceries, but she denied his request.
Does he not have some recourse?
Response: He can ask for reconsideration and ask for accommodation with his doctor's note. However, the employer is under no legal obligation to grant his request for reconsideration. Nevertheless, it does not hurt to ask.
Let me know if you still further clarification.