He was diagnosed with a high-ankle injury. Following the weekend's action, head coach Andy Reid confirmed to reporters Monday that Mahomes does indeed have a high-ankle sprain, adding that he's "doing OK" and "working hard on the treatment." Reid also noted that he wants to wait and see how Mahomes is feeling before determining the amount of reps he'll receive throughout the week of practice.
After the win, Mahomes revealed during his postgame interview with Melissa Stark that the Chiefs staff gave him an ultimatum after his exit; either go to the locker room or not have a chance to return to the game.