[1] In 2005, he entered the All-American Driver Challenge contest with the winner receiving a USAC midget ride from Tracy Trotter.
Riethmeyer ultimately won the challenge after defeating the other finalists at Hickory Motor Speedway in March 2006, which allowed him to start competing in the United States Auto Club (USAC) Midget Series.
Midget chassis builder and challenge judge Bob East described Riethmeyer as "an extraordinary amount of talent for never stepping foot (sic) in an open-wheel car before.
[4] During his title run, he joined Win-Tron Racing for his maiden ARCA Re/Max Series start at the Illinois State Fairgrounds.
[5] Riethmeyer attempted to make his Truck Series debut in 2006 at Martinsville Speedway for Robert Richardson Racing in an alliance with the All-American Driver Challenge, but failed to qualify.