The Latest on the Olympics ahead of the Rio Games (all times local to Rio de Janeiro):
Four years ago, Katie Ledecky was the youngest member of the U.S. Olympic swimming team.
She might be again.
The 19-year-old Ledecky is younger than any of the swimmers to make the team so far during the Olympic trials in Omaha, Nebraska.
With only two events left on the final day of the meet, the only swimmer younger than Ledecky who still has a chance to make the team is another 19-year-old, Katrina Konopka, who qualified for the final of the 50-meter freestyle.
Konopka was born about one month after Ledecky in 1997.
Michael Phelps is all done racing at the U.S. Olympic swimming trials.
But he might get in the pool one more time.
Eager to be on all three relays at the Rio Games, Phelps said he's considering whether to do a time trial Sunday in the 100-meter freestyle at the CenturyLink Center.
Several other swimmers might join him, but Phelps will mainly be competing against the clock.
Phelps withdrew from the 100 and 200 free in Omaha, wanting to focus on his best individual events, but he's a longtime stalwart on the U.S. relay teams.
At the Olympics, Phelps will surely swim butterfly on the 4x100 medley relay and take part in the 4x200 free relay. But he's never specialized in the 100 free and, after posting some sluggish times even while winning all three of his events at the trials, he might want to show the coaching staff what he's worthy of being on the 4x100 free relay.
Phelps does have one edge: the head coach of the U.S. men's team is Bob Bowman, who also happens to be Phelps' personal coach.
Lindsay Vrooman didn't make the U.S. Olympic team, but she didn't walk away from trials empty-handed.
The 24-year-old swimmer was proposed to by her boyfriend on deck at the end of Saturday night's session. Vrooman said yes to Logan Schaefer, whom she met at Indiana University where they swam together. The couple has been dating for just over three years.
Vrooman was crying and laughing at the same time while showing off her sparkly ring. Because he didn't have a credential, Schaefer worked it out with USA Swimming and the meet referee to gain deck access and pull off the surprise.
Schaefer says he wanted to propose at trials because it's the ending of Vrooman's swimming journey and the beginning of a new life together.
Abbey Weitzeil is heading to the final as the fastest qualifier in the 50-meter freestyle at the U.S. Olympic swimming trials.
Weitzeil won her semifinal heat in 24.34 seconds, just ahead of Madison Kennedy (24.39).
Also advancing to Sunday's final were the winner of the other semi, Simone Manuel at 24.58, along with Katrina Konopka, Olivia Smoliga, Lia Neal, Dana Vollmer and Amanda Weir.
Nathan Adrian won the 50-meter freestyle at the U.S. Olympic swimming trials Saturday night, making up for the disappointment of failing to qualify four years ago.
In a furious dash from one end of the pool to the other, Adrian touched ahead of Anthony Ervin in 21.51 seconds. Ervin claimed the second spot for Rio - one-hundredth of a second behind the winner.
Two-time Olympian Cullen Jones won't be heading to Rio. The silver medalist from London finished third at 21.75, missing a spot on the U.S. team.
At age 32, it might've been Jones' last hope. He was the last man to climb out of the pool, soaking up the moment for as long as possible.
Then again, age hasn't been a hindrance to Ervin. The 35-year-old is the oldest swimmer at the trials, but he's heading to the Olympics for the third time.
Adrian swept the 50 and 100 freestyle at the trials. In 2012, he stunningly failed to make the U.S. team in the 50, but captured Olympic gold in the 100.
QUALIFICATION ALERT: Nathan Adrian has qualified for the Rio Olympics in the 50-meter freestyle.
Katie Ledecky added a third race to her Olympic schedule, cruising to a nearly 10-second victory in the 800-meter freestyle at the U.S. swimming trials Saturday night.
One night after competing in the 100 free, the 19-year-old Ledecky didn't have quite enough in the tank to challenge her own world record. She finished in 8 minutes, 10.32 seconds, far off the mark of 8:06.68 she set in January at a meet in Austin, Texas.
Still, it was another dominating performance by a swimmer who surprisingly captured gold in the 800 free four years ago, but will go into Rio as one of the biggest favorites in any sport. Leah Smith took the second Olympics spot in 8:20.18 - nearly half a lap behind Ledecky.
Ledecky also posted wins in the 200 and 400 free at the trials in Omaha, Nebraska, which means she'll have three individual events and a relay at the Olympics. The only thing that didn't go her way: a seventh-place finish in the 100 free, an event she only recently started focusing on in hopes of landing a second relay race.
She'll be busy enough as it is.
QUALIFICATION ALERT: Katie Ledecky has qualified for the Rio Olympics in the 800-meter freestyle.
Michael Phelps made it three-for-three at the U.S. Olympics swimming trials, rallying over the final lap to win the 100-meter butterfly Saturday night.
In what was billed as the farewell race in his home country, Phelps competed in lane seven after a sluggish swim in the semifinals. As usual, it took him a lap to really get going, making the turn in fourth place.
But Phelps powered to the front, his huge wingspan ripping through the water. With a long glide to the wall, he finished in 51.00 seconds.
When Phelps saw the ''1'' beside his name, he pounded the water and pointed toward his family - including 7-week-old son Boomer - up in the stands. He'll now get a chance to win his fourth straight gold in the 100 fly at Rio.
The real race was for the second Olympic spot, which went to Tom Shields in 51.20. He touched just ahead of Seth Stubblefield (51.24) and Jack Conger (51.26).
QUALIFICATION ALERT: Michael Phelps has qualified for the Rio Olympics in the 100-meter butterfly.
Maya DiRado clinched her third individual event of the Rio Olympics with a victory in the 200-meter backstroke at the U.S. swimming trials, beating defending gold medalist Missy Franklin.
Franklin held on for the runner-up spot, good enough to ensure she'll at least get a chance to go for another gold next month.
DiRado has been a breakout star of the trials, following up her victories in the 200 and 400 individual medley with another dominating win in the backstroke. She touched in 2 minutes, 6.90 seconds - nearly a body length ahead of Franklin, who finished at 2:07.89 and held off Lisa Bratton by 31-hundredths of a second.
Franklin claimed her second individual event in Rio, having also taken the second spot in the 200 freestyle. She'll also swim the 4x200 free relay, a far cry from her grueling seven-event program at London four years ago.
QUALIFICATION ALERT: Maya DiRado has qualified for the Rio Olympics in the 200-meter backstroke.
Nobody had a busier day at the U.S. Olympic track and field trials than Tianna Bartoletta.
The world champion in long jump secured her Olympic berth in that event, which was going on at the same time as her 100-meter qualifying heats. She advanced to the semifinals in the 100.
Bartoletta petitioned for a schedule change to no avail. So, she changed her entire practice routine to get ready. On an 83-degree day in Eugene, Oregon, she took one jump before running in the 100, passed for two rounds, then came back and jumped again.
Other qualifiers for long jump were Olympic champion Brittney Reese, whose jump of 23 feet, 11 3/4 inches was the longest of 2016, and Janay DeLoach.
Allyson Felix advanced to the final of the women's 400 meters at Olympic trials, finishing her lap in 50.31 seconds, .03 behind Francena McCorory.
Felix is nursing an injured right ankle that she said is still bothering her.
She is aiming for a double in the 200 and 400 meters, and so far, the ankle injury has done nothing to change those plans.
The final is set for Sunday.
Justin Gatlin, Tyson Gay, Trayvon Bromell and Mike Rodgers all advanced easily through the first round of 100 meter qualifying.
Gatlin won his heat in 10.03 seconds, to move one step closer to a possible Olympic showdown with Usain Bolt.
Gatlin lost to Bolt by .01 seconds last year at world championships.
Bolt pulled out of Jamaica's national championships with an injured hamstring, but Gatlin said he fully expects the world-record holder to be in Rio next month.
Whitney Ashley won the discus title at the U.S. Olympic track and field trials on Saturday by edging Shelbi Vaughan of Texas A&M. Wisconsin's Kelsey Card was third.
Ashley's top throw came on her fifth attempt, when she sent the discus 204 feet, 2 inches (62.25)
Molly Huddle led pretty much the entire way as she breezed to a win in the 10,000 meters Saturday at the U.S. Olympic track and field trials.
Huddle didn't raise her hands as she crossed the line - a lesson she learned the hard way at world championships last August in Beijing. She was headed for the bronze when she slowed down and raised her arms at the finish, only to be edged out by American teammate Emily Infeld.
The 31-year-old Huddle used a powerful final lap to hold off Infeld on Saturday at Hayward Field in Eugene, Oregon. She finished in a time of 31 minutes, 41.62 seconds.
Marielle Hall was third.
QUALIFICATION ALERT: Molly Huddle, Emily Infeld and Marielle Hall have qualified for the U.S. Olympic team in the 10,000 meter run.
Connor Jaeger qualified fastest for the 1,500-meter freestyle final at the U.S. Olympic swimming trials.
His time of 14 minutes, 58.59 seconds for the 15-lap race made Jaeger the only swimmer to break 15 minutes. Jordan Wilimovsky was second fastest in 15:05.89.
Wilimovsky is already going to Rio to compete in the 10-kilometer open-water race. Sean Ryan, also headed to Rio for the 10K, failed to qualify in the 1,500 free.
Also advancing to Sunday's eight-man final was Michael McBroom, third quickest in 15:07.42.
Missy Franklin is trying to put a positive spin on her disappointing performance at the U.S. Olympic swimming trials.
Franklin competed in seven events and won four golds medals at the London Games four years ago.
At the most, she'll have only three events in Rio. Franklin qualified for the 200-meter freestyle, and she's going for a spot in the 200 backstroke Saturday night. In addition, she'll swim on the 4x200 freestyle relay.
Franklin says she hasn't sat in the stands at an international meet since 2011 but she's looking forward to it. She says ''it might be really nice to go to an Olympics and really enjoy the experience instead of swimming so much.''
Madison Kennedy was prepping for a television interview when the cameraman gave her a gentle nudge and motioned toward her nose.
He thought it was a drop of water. Actually, it's a nose ring. Kennedy jokes that that her mother ''loves it too. She always says it looks like a booger.''
Kennedy was top qualifier in the preliminaries of the 50-meter freestyle, putting her a step closer to qualifying for her first Olympics.
Elizabeth Beisel is swimming in a lot of pain at the U.S. Olympic trials.
The two-time Olympic medalist broke her left pinky finger when she collided with another swimmer in the training pool. Beisel initially had a shot to lessen the pain, but that's worn off and she prefers to maintain her feel in the water when she's competing.
So the finger is taped up and she's competing in ''excruciating'' pain - especially when she puts her hand on the wall.
It's been a tough couple of weeks for Beisel, who was hospitalized with a stomach virus shortly before coming to Omaha, Nebraska. She still managed to qualify for the Olympics in the 400-meter individual medley, and she's in the final of the 200 backstroke Saturday night.
Madison Kennedy has qualified fastest in the 50-meter freestyle at the U.S. Olympic swimming trials.
Already the top-ranked American in the event, the 28-year-old sprinter from Avon, Connecticut, swam 24.52 seconds in the preliminaries Saturday in Omaha, Nebraska.
Simone Manuel was second quickest in 24.57, followed by Abbey Weitzel in 24.58 and Olivia Smoliga in 24.78.
Also advancing to the evening semifinals are Dana Vollmer, Amanda Weir and Lia Neal.
Kennedy is trying to make her first Olympic team. Manuel, Weitzel, Smoliga, Vollmer, Weir and Neal already are going to Rio.
Jessica Hardy, who won the 50 free at trials four years ago, wasn't among the top 16 qualifiers.
Paralympic long jump champion Markus Rehm won't be seeking selection for the Rio de Janeiro Olympics, after all.
Rehm, a right leg amputee, was aiming to become the second athlete with a carbon-fiber prosthesis to compete at the Olympics and Paralympics after now-disgraced South African runner Oscar Pistorius in 2012.
The IAAF announced his decision after Rehm met on Friday with IAAF General Secretary Jean Gracia and agreed to join a working group on the use of prostheses in competition, with the aim of changing rules to allow athletes with prostheses to compete in future world championships.
To become eligible for the Olympics, Rehm had to prove that his prosthesis gives him no advantage over other athletes. A study he commissioned on the issue was inconclusive.