• In his very first supercross season, Garrett used it as a learning experience that ultimately brought him his first podium in San Diego. He eventually would tally five additional top-10 finishes and finish 10th in the standings. Garrett was starting to make strides in the Pro Motocross season before suffering a crash at High Point that would keep him out until Spring Creek. He returned to earn ninth and would finish ninths at Unadilla and Ironman as well.
• Garrett joined the squad for the second half of the 2018 season. Competing in the outdoor motocross series, Garrett impressed many by consistently running top 10 overall in the first three rounds. Crashes at High-Point and RedBud would set Marchbanks back and forced him to end his season early. Despite the setbacks, the rookie showed speed and managed to finish the series 19th overall.