E.R. Fightmaster

Emmett Rogers Fightmaster (born June 8, 1992), known professionally as E. R. Fightmaster, is an American actor, producer, and writer. Fightmaster is known for their work on Grey's Anatomy as Dr. Kai Bartley, and through their solo music project Fightmaster (stylized in all caps) with their 2023 EP Violence.

Alongside acting, E.R. Fightmaster is also known as a producer, writer.

E.R. Fightmaster's most notable role to date came in Grey's Anatomy (2005), where they played Dr. Kai Bartley. They also appeared in Sorry, Baby (2025) as Fran.

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