Offerman played would-be assassin of Wild Bill Hickok, Tom Mason, in an early episode of the HBO series Deadwood and in the third-season episode of Monk, "Mr. Monk and the Election" as a helper for the campaign of Natalie Teeger.
Offerman bermain sebagai pembunuh Wild Bill Hickok, Tom Mason, di awal episode serial HBO berjudulDeadwood dan di ketiga-musim episode Monk, "Mr. Monk and the Election" sebagai pembantu kampanye Natalie Teeger.