Just before the 50-meter butterfly race, U.S. swimmer Jason Lezak, who was late for the start, came running out on the pool deck in an effort to get to the starting blocks in time.
But once on the blocks, he fell into the water and was disqualified ahead of the start. Lezak was a late addition to the later 50 freestyle and might not have wanted to swim two races in a row.
He finished second in the freestyle, behind teammate Gary Hall Jr.
The Americans also got victories from Tom Wilkens, in the 200 breaststroke and the 200 individual medley and Tom Malchow in the 200 butterfly.
Australians swept the men's and women's triathlons.
Chris McCormack won the men's event, which comprised a 1.5-kilometer swim in the Brisbane River, a 40K cycle leg and a 10K run. Loretta Harrop won her second straight women's title on a course along the riverside Southbank Parklands.
American Barb Lindquist finished second to Harrop. World No. 1 Siri Lindley and American teammate Sheila Taormina placed fourth and fifth, respectively.
Germany won three gold medals in cycling, while American Marty Nothstein was fined for a crash that sent four riders to the hospital.
None of the riders who piled up in the infield appeared seriously hurt, but all were sent to the hospital as a precaution.
Mexico, trying to revive its hopes of qualifying for next year's World Cup, rallied to defeat Jamaica 2-1, in Kingston, Jamaica.
Jamaica had been unbeaten at home since losing to the United States in November 1994.
With three games remaining, Costa Rica (5-1-1) leads the six-nation finals of the North and Central American and Caribbean region with 16 points.
The United States (4-2-1), which plays Wednesday at Costa Rica, is second with 13 points, two ahead on Honduras (3-2-2) and three ahead of Mexico (3-3-1).
The top three nations qualify for next year's 32-nation tournament in Japan and South Korea.
Star skier Hermann Maier can't remember details of the motorcycle accident that left him with a broken leg and put his career in jeopardy.
Maier, undergoing treatment in the intensive care unit of a Salzburg hospital, spoke to the media in Vienna, Austria, for the first time since his crash 10 days ago.
Maier appeared shaken and tired as he spoke with Austrian national TV network ORF, his voice quavering.
Doctors have been reluctant to speculate whether Maier - who won two gold medals at the 1998 Olympics and has won the overall World Cup title three times - will be able to race again.
Horace A. "Jimmy" Jones, who trained Citation to the final two legs of the 1948 Triple Crown and saddled two Kentucky Derby winners, has died. He was 94.
Jones died at St. Francis Hospital in Maryville, Mo., which released no other information.
Jones' training career started in 1926, and he retired in 1964, having won 54 stakes races and saddled seven champion horses. He was the country's leading trainer five times (1947-49, 1957, 1961) and was the first trainer to better the $1 million mark in purses.
He was inducted into the National Museum of Racing and Hall of Fame in 1959.