INGLEWOOD, Calif. -- Nationalore, who ran in both the Kentucky Derby and Breeders' Cup Juvenile and was believed to be the country's richest maiden with earnings of $318,227, was euthanized after suffering a fractured right shoulder in a one-horse spill in Wednesday's sixth race at Hollywood Park, track stewards said.

His rider, Tyler Baze, was taken to a local hospital for x-rays. Before he left the track, Baze was diagnosed with a dislocated small finger on his left hand.

Racing into the first turn of the 1 1/16-mile maiden race, Nationalore appeared to clip heels with 6-5 favorite Dramatic Show, throwing Baze to the ground. Nationalore ran off momentarily before being vanned off.

Baze, the leading apprentice jockey at the meeting, was placed in an ambulance on the racetrack.

Alyaxy ($40.60) won the seven-horse race that had only five finishers. Indy Film, who was impeded in the spill, was pulled up on the backstretch.

Nationalore, owned and trained by Myung Kwon Cho, was winless in 26 starts, but had earned $318,227. He finished third in the 1997 Breeders' Cup Juvenile at Hollywood Park and was ninth in the 1998 Kentucky Derby.