Three jockeys were injured in a spill during the running of the fourth race at Bowie yesterday.

Thomas Kupfer, 22, Bowie's leading jockey with 28 victories, suffered two fractured ribs and a bruised lung. He was flown by helicopter to the shock trauma unit of the University of Maryland Hospital in Baltimore, where he was kept overnight.

Also injured were Phil Grove, 33, kicked in the face by a horse after he fell, and James Fazio, 25, who complained of back and rib injuries.

Fazio was treated at Doctors Hospital in Lanham and released. Grove was treated for a fractured left shoulder and multiple facial lacerations. He was kept overnight at Doctors.

The accident developed after Fly Jack, leading in the middle of the backstretch, with Kupfer up, suddenly snapped his right hind leg and crumbled to the ground. He was later destroyed.

Fazio tried to avoid the fallen horse on his mount, Fronto, but that horse tripped, throwing Fazio over his neck. Films showed that Fazio was struck by Bluegenes.

Grove and Landevar then fell over the fallen horses, and Grove was struck by Hall Monitor as that trailer sped by.

The race was won by Rollicking Rhythm, which avoided the spill and registered a clear victory under Danny Wright.