Already holding the title of 2011 FIM MX2 World Champion before he even turned 18 years old, Ken Roczen decided to make the transition from the GPs to the American motocross circuit in 2012 and quickly established himself as one of the sport's bright young stars.
Riding for the Red Bull KTM team, Roczen placed fourth in 250MX points in his first season of the Lucas Oil Pro Motocross Championship, winning the first moto of his career at Unadilla late in the season.
Roczen would take a giant leap forward in 2013, besting Eli Tomac for the 250 West Region title in Supercross, then holding the 250 Class points lead through the first eight rounds of the Lucas Oil Pro Motocross Championship. He had put himself in position to potentially bring home an outdoor title, but a crash at Spring Creek caused him to lose possession of the red plate, and over the final rounds of the season, he was unable to match the performance of Eli Tomac.
The next season brought a move to the 450 Class for Roczen, and his very first race in the division was a victory at the opening Supercross round. The young German would pick up another win en route to finishing third overall in points.
2014 also marked his first season in the premier class in the Lucas Oil Pro Motocross Championship, and Roczen quickly proved himself to be a major threat, winning eight motos and five overalls and earning the 450MX championship in his rookie season.
Roczen left Red Bull KTM after his championship-winning season, joining the RCH Suzuki squad for 2015.