Jessica Hardy won the 50m freestyle at the US Olympic swimming trials as Dara Torres was denied in her bid to make a sixth Olympic team.
Hardy clocked 24.50sec to add the 50m to her surprising 100m free triumph with Joyce second in 24.73.
Phelps, who won an unprecedented eight gold medals in Beijing and qualified to swim the same events in London, said he wouldn't swim the 200m freestyle in his fourth and final Games, giving him a seven-event slate.
Torres was trying for just one and when the effort was done she said her swimming career was over.
"This is really over," Torres said as she held 6-year-old daughter, Tessa, in her arms.
Torres lingered at the finish, hugging Hardy and Joyce in the lanes to either side of her and taking a long look around as she exited the pool.
"That's it. I'm going to enjoy some time with my daughter, have a nice summer and cheer the US team on from afar."
Torres had already become the oldest woman swimmer to compete in the Games when she won three silver medals in Beijing at 41.
Since then she has undergone reconstructive surgery on her left knee, and coped with the death of German-born coach Michael Lohberg, who helped guide her to a fifth Olympics eight years after her fourth.
Lohberg was diagnosed with aplastic anemia shortly before the Beijing Games and died in April of 2011 and Torres teared up as she spoke of him.
"I was very emotional before my swim," Torres said. "When I was putting my suit on with my trainer, Anne Tierney, we started crying because I started thinking about Michael. In July of 2010, he had said to me, 'Let's go for this.'
"I really wanted to finish the story that I started with him. I didn't make it, but I know he would have been proud."
Hardy, the 100m breaststroke world record-holder who was shut out of the top two in that event, was astonished to add the 50m free to the 100m free she won in the wake of her breaststroke disappointment.
"I didn't have any cognitive thoughts during the race," Hardy said. "I was just 'Go! Go! Go!'
"I couldn't have predicted this," added Hardy, who missed Beijing and served a one-year ban after a positive drug test that arbitrators eventually ruled was caused by a tainted supplement.
"I thought I was going to be a better breaststroker here for sure."
Source: AFP Global Edition