Jimmi Simpson (born November 21, 1975) is an American stage, film and television actor, best known for his recurring roles in television series, such as House of Cards, It's Always Sunny in Philadelphia, Psych, and Westworld.
In early-1970s Las Vegas, low-level mobster Sam “Ace” Rothstein gets tapped by his bosses to head the Tangiers Casino. At first, he’s a great success in the job, but over the years, problems with his loose-cannon enforcer Nicky Santoro, his ex-hustler wife Ginger, her con-artist ex Lester Diamond and a handful of corrupt politicians put Sam in ever-increasing danger.