De acordo com esta entrevista com Smith eles usaram próteses que puxaram as orelhas e mudaram a linha do cabelo:
But besides taking dialect training Smith also had to undergo a physical transformation to help him look more like Nigerian doctor Dr. Bennet Omalu. “I had a prosthetic that was glued to pull my ears back and that changes the shape of my face,” he explained. “And I had a small piece that changed the shape of the hairline. It was really subtle, but just little things like that.”