ANAHEIM, Ca. - Ryan Dungey, one of the most decorated riders in motocross history, is riding away from the sport.

Dungey announced his surprise retirement at a news conference Tuesday in Anaheim, California.

The 27-year-old rider from Belle Plaine, Minnesota, won nine motocross titles, wrapping up his fourth Supercross title two weeks ago in Las Vegas by holding off Eli Tomac.

Dungey was one of the sport's most consistent riders, finishing on the podium 69 times in 75 career starts. He was the first rookie to sweep the 450cc Supercross and outdoor titles and won three straight Supercross titles.

Dungey also has three outdoor titles, won the Motocross des Nations three times and was the first motocross rider to appear on a Wheaties box.