Nate Kirchener (also known as "Opie") is a former driver of Iron Outlaw. Before his Monster Jam driving career, he was the crew chief to Dennis Anderson and team Grave Digger, as well as Candice Jolly and Monster Mutt Dalmatian.
He only ran in one Monster Jam show in 2014.
He briefly returned to driving in 2021, driving Wrecking Machine and Rockwell R.E.D. in Albuquerque, New Mexico.
In 2023, he drove Earth Shaker for Team Throttle Monster in Edmonton, Alberta, Canada.
In 2024, he made an appearance in Tucson, Arizona, driving Earth Shaker.
In 2025, he drove Dirt Crew Dozer in Spencer, Iowa.