Swimming and DivingWorld record-holder Samantha Riley of...

Swimming and Diving

World record-holder Samantha Riley of Australia was disqualified in the 100-meter breaststroke for using a downward dolphin kick in the preliminaries of the Pan Pacific championships in Atlanta.

Riley was disqualified by referee Charly Mallery of Miami for using an illegal underwater dolphin kick several times in the final 25 meters, meet officials said.

Tom Dolan, a five-time national champion, won the 400-meter individual medley as the United States took five of eight gold medals.

David Pichler easily defended his one-meter national diving title at Bartlesville, Okla. Brian Earley of Irvine was second.

In the women’s three-meter semifinals, Becky Ruehl, 17, sailed to a 13.5-point lead over her closest challenger, Eileen Richetelli.