MMA fighter Jason "Mayhem" Miller pleaded not guilty on Monday to a charge of resisting and obstructing a peace officer.
Miller was arrested on Oct. 9 after a standoff with sheriff's deputies at a Mission Viejo house.
Deputies were serving an arrest warrant at the home in the 26000 block of Avenida Calidad when the 33-year-old ran back into his house and refused to come out of his home.
The situation quickly drew national attention as Miller live-tweeted throughout the standoff.
Authorities say they've had several run-ins with Miller in the past. In 2012, he was found naked inside a Mission Viejo church. He was accused of vandalism, but the charges were dismissed.