Kenny Johnson is an American actor. He is known for his roles as Detective Curtis Lemansky in The Shield, Butch "Burner" Barnes in Pensacola: Wings of Gold, Detective Ham Dewey in Saving Grace, Herman Kozik in Sons of Anarchy, Matt Webb in Prime Suspect, Caleb Calhoun in Bates Motel, Dominique Luca in the CBS drama series S.W.A.T., and Tommy Welch on Chicago Fire (2014–2015).