Mike Tully, the man who came back, made his heavy flying schedule worthwhile tonight by winning the pole vault at a record-setting 17 feet 10 inches in the Pan American Games.

Tully, one of 12 U.S. athletes who went home Tuesday in a flight largely prompted by a drug-testing scare, was the second U.S. man to win a track and field gold medal here. Elliott Quow earlier captured the 200 meters in 20.42. Among the women medalists, Benita Fitzgerald of Dale City, Va., won the gold in the women's 100-meter hurdles, clocking 13.16, and Randy Givens of Florida State won the 200 meters in 23.14.

After the competition, Tully underwent drug testing for approximately 45 minutes and then came out and gave a statement on why he had left Caracas, along with 11 other U.S. athletes, and then returned.

"I had a pressing business and personal matter in Los Angeles that was very urgent," Tully said. "I had planned to compete in the Pan Am Games from way back and I'm happy to compete for the United States. This is the eighth track meet I've been to this year where they've had doping control. I'm glad to be here."

He wouldn't answer questions.

A man who thoroughly deserved a medal was Agberto Guimares of Brazil, who completed an 800-1,500 double despite a hostile crowd. It was Guimares who jostled William Wuyke of Venezuela in the 800 on Wednesday, and Wuyke's subsequent fall has become a cause celebre in Venezuela.

Fitzgerald was slow out of the blocks in the hurdles, after two false starts left the field a bit jumpy. For added confusion, the victory ceremony for an earlier event was delayed, leaving the hurdlers standing in the rain.

But Fitzgerald concentrated on her technique, passed teammate Kim Turner at the fifth hurdle and went on to win smoothly in a moderate headwind.

"The delay was tough, because you have to psych yourself, then come down and psych yourself again," Fitzgerald said. "It was like a roller coaster ride . . . I'm tired mentally and physically, but this is my last meet of the season and I just wanted to win it."

Guimares' stretch run to overhaul Ross Donoghue of the United States was remarkable, considering the circumstances.

After winning in 3:41.91, Guimares jogged around the track, waving his arms to the crowd, which responded by throwing oranges and paper cups at him. Then he stepped into the field and threw up his fist to the crowd, which continued the barrage.

There had been so much noise at the start that, after one false start, officials waited and pleaded with the crowd to be quiet. "I'm happy with the crowd. The crowd was good for me, made me want to run harder," said Guimares, who attended Brigham Young. "There was no foul in the 800 and I waved to the crowd to try to show them nothing was wrong."

Asked if he was worried by the debris, Guimares replied, "Wouldn't you be?"

U.S. women finished one-two in the 200, with Givens winning over Lashon Nedd of UCLA, who edged Cuba's Luisa Ferrer.

Maria Colon of Cuba took the javelin at 209 feet with teammate Mayra Vila second.

Emilio Ulloa won the 3,000-meter steeplechase for Chile's first men's track and field gold since Guillermo Sola captured the same event in 1955. The time was a slow 8:57.62 and the lone U.S. entry, Dave Daniel, placed fourth in 9:08.73. Henry Marsh, the U.S. champion, was a scheduled entry, but he failed to appear and Coach John Randolph said he had heard nothing from Marsh.

The United States was left without an entry in the decathlon when John Crist dropped a marble table top on his foot. The other decathlete, Greg Bastien, erroneously reported by the U.S. Olympic Committee to have left Tuesday, was scratched with a leg injury.

In baseball, Cuba had 13-strikeout pitching from Rogelio Garcia and routed the United States, 8-1, to win the gold medal. Nicaragua, which beat the United States Thursday and the Dominican Republic, 6-5, today, won the silver medal and the United States settled for the bronze.

In men's softball, Reggie Underwood hit a two-run homer in the first inning, shattering pitcher Dave Scott's perfect record, and Canada rolled on to an 11-5 victory over the United States for the gold medal.

In boxing, light heavyweight Evander Holyfield of Atlanta and heavyweight Henry Tillman of Los Angeles reached the finals.