Tell him to take it easy - sprains take longer to heal than breaks!
That is especially true with kids and teenagers!
His ankle seems to have healed very well, he is not favoring the other foot, or showing any signs of injury any longer. The Dr. said it was only a mild sprain on Monday, and that if it felt better by Wednesday he could resume activities (although I told him Friday at the earliest!) So, I think he will be good to go rejoining football practice on Monday!