2010 
Villopoto captured the most wins of any competitor in the AMA Supercross series with a total of seven victories in 14 races. While leading the main event in St. Louis, Villopoto broke his leg and was forced to sit out the remaining three events and the AMA Motocross series.

2009 
In an injury shortened rookie season, Villopoto earned two AMA Supercross wins (Seattle, Las Vegas) and one 450cc AMA Motocross overall win.

2008
Earned his third consecutive AMA Motocross 250cc Championship by winning eight events and finishing on the podium in 11 of 12 starts. Finished second in the AMA Supercross Lites East Region Championship with three wins and five podiums in seven starts. Claimed the MX2 championship at the Motocross of Nations helping Team USA earn the team title for the third consecutive year.

2007
Won seven races during the AMA Supercross Lites West Region Championship on his way to the series title. He then turned his attention to motocross where he won the AMA Motocross 250cc Championship on the strength of five wins. Named to Team USA for the Motocross of Nations, Villopoto won the MX2 Championship and helped the team to the overall victory. Capped off the season by being named the SPEED AMA Athlete of the Year.

2006
Earned one win in his debut Supercross Lites season. During the outdoor motocross series he won six times en route to claiming the AMA Motocross 250cc title in his rookie season. His rookie campaign earned him a spot on Team USA at the Motocross of Nations as well as 2006 AMA Supercross/Motocross Rookie of the Year.

2005
Made his professional racing debut at the final three rounds of the season earning a best finish of second in the AMA Motocross 250cc at the series finale. Won the 2005 AMA Horizon Award.

2003-2004
Won an impressive 24 titles while competing for Kawasaki’s Team Green™.