Martin Sensmeier (born June 27, 1985) is an American actor and model. An Alaska Native, he is Tlingit and Koyukon Athabascan. Sensmeier is known for playing various Native American roles. He starred in The Magnificent Seven (2016), a remake of the 1960 film of the same name, and had a recurring role as "Wanahton" in the HBO television series Westworld (2018). More recently, he has played a physical therapist in the TV series Yellowstone and a Comanche warrior named Sam in the prequel 1883, both directed by Taylor Sheridan. (Via Wikipedia)