The United States collected five more gold medals in Pan American Games swimming and diving today. Of 22 events thus far, the United States has won 19.

One of the most popular swimming victories, however, went to a Canadian. Anne Ottenbrite, who was disqualified Thursday in the preliminaries of the 200-meter breaststroke, adjusted her controversial kick and returned today to capture the 100 in a Commonwealth and Pan Am Games record time of 1:10.63.

In boxing, Floyd Favors, the world champion at 119 pounds from Capitol Heights, Md., was knocked down in the first round and penalized a point for holding, but still scored a 3-2 decision over Puerto Rico's Juan Molina. "I dropped my guard and he hit me good," Favors said of the knockdown.

Before Ottenbrite's success, the spectators had listened with increasing restlessness to four renditions of the "Star-Spangled Banner," along with television-inspired cheers by the U.S. swimmers. Wendy Wyland took the platform diving, Bruce Hayes won the 400-meter freestyle, Steve Lundquist prevailed in the 200-meter breaststroke and Laurie Lehner, 25, became the 100-meter butterfly champion. After "O Canada" was lustily cheered in Ottenbrite's honor, the U.S. men added another gold in the 4x100-meter freestyle relay.

Ottenbrite's performance was remarkable in that she had only one day to alter her kick and prepare for the event, yet she posted her career best time. The 17-year-old Commonwealth Games champion has a disjointed knee that complicates her kick and the disqualification Thursday was her third this year.

" I didn't want to change, but I had no choice," Ottenbrite said. "I'm moving my legs faster than before and it seems to get more speed. But I didn't know what to expect today. I tried to concentrate more, with the results."

Teammate Kathy Bald, who won the 200 in Ottenbrite's absence, placed second today, followed by the U.S. tandem of Kim Rhodenbaugh and Tracy Caulkins.

The United States and Canada also filled the first four places in the 100 butterfly, with Lehner winning in 1:01.14 And the next three spots going to Michelle MacPherson of Canada, U.S. high schooler Patty King and Canadian Marie Moore.

"I had hoped possibly to go under a minute, so this was disappointing for me personally," said Lehner, the team's oldest member, just as her sister, Wendy Boglioli, was the oldest U.S. swimmer in the 1976 Olympics.

Lundquist broke his own Pan Am record from 1979 as he won the 200 breaststroke in 2:19.31. Pablo Restrepo of Colombia and Southern Illinois slipped in second ahead of Doug Soltis, who took some heat from fans during the victory ceremony.

Lundquist was only sixth best in the morning qualifying, but he led all the way in the final. He admitted he had gone at a relaxed pace in the prelims because there was only 6 1/2 hours between them and the final, as dictated by television, rather than the 11 hours of earlier programs.

"You can't kill yourself in the morning when it's so close to the evening swim," he said. "But I went out too hard in the final and my stroke wasn't quite right. I went out like a bullet and came in like a coffin."

Hayes held off teammate Matt Cetlinski to win the 400 freestyle in 3:53.17. U.S. Coach Don Gambril was able to celebrate a one-two-three finish in that one, as the bronze went to one of his Alabama swimmers, Marcelo Juca of Brazil.

"We didn't have much time between qualifying and finals today, but at least the sun was out and it was warmer than it's been at night," said Hayes, who won the 200 freestyle on Wednesday.

Most interest in the relay focused on second and third place, with Brazil and Venezuela edging Canada for those medals.

Rowdy Gaines, the oldest U.S. male swimmer at 24, anchored in a fine 49.81 as the United States set a Pan Am mark of 3:21.41. He was preceded by Robin Leamy, Matt Gribble and Chris Cavanaugh. Wyland led the diving throughout and survived a difficult moment as she prepared for her final dive. The Venezuelan swin team entered the building just as she was given the go-ahead signal and the crowd responded with loud applause.

Veronica Ribot of Argentina was second and Guadalupe Canseco of Mexico third, as a shaky back dive on which she twice faltered before takeoff shoved Megan Neyer into fourth.