For the first time in 12 years, an incumbent is not running in this race.
That's because assemblyman Patterson is terming out -- he's endorsed David Tangipa to fill his seat.
George Radanovich is a Mariposa native and endorsed by the Republican party.
He served in Congress from 1994 to 2010 before voluntarily retiring.
Also running in this race is Democrat David Helsel, who is a substitute teacher.