OMAHA, Neb. — For Missy Franklin, it was another miss at the U.S. Olympic swimming trials Thursday night.

Franklin, the star of the London Games, struggled to an 11th-place showing in the semifinals of the 100-meter freestyle, failing to even reach the final.

That leaves Franklin with one individual race in Rio and one more chance to bulk up her program: the 200 backstroke.

No matter what, Franklin will be much less of a presence at these Summer Games than four years ago.

“That speed just doesn’t feel like it’s quite there this meet,” she said. “No idea why. It’s super disappointing but I really feel like my endurance is there, so it gives me a lot of hope for my 200 back.”

While Franklin struggles, another Olympic gold medalist will get a chance to defend his title.

Nathan Adrian, the burly 27-year-old who won the 100 freestyle in London, used a powerful finishing kick to win in 47.72 seconds. Caeleb Dressel also will get to swim the down-and-back sprint in Rio, taking second at 48.23.

Anthony Ervin, 35, the oldest swimmer at the trials, got off to a blistering start and led at the turn. He couldn’t hold on, fading to fourth in 48.54, touching behind Ryan Held (48.26).

But the top four are assured of spots on the team for the 400 free relay, meaning Ervin will be headed to his third Olympics.

On the fifth night of the meet, Josh Prenot became the latest Olympic rookie to make the team, knocking off Kevin Cordes in the 200 breast stroke. Cordes already had won the 100 breast and was more than a second under world-record pace at the final turn of the longer race.

But Prenot, furiously bouncing up and down in the water, surged past Cordes on the final lap to win in 2 minutes, 7.17 seconds, setting an American record and finishing just off the world mark of 2:07.01 held since 2012 by Akhiro Yamaguchi of Japan.

Cammile Adams won the 200 butterfly after being briefly disqualified one day earlier during the preliminaries. The ruling that she made an illegal turn was quickly overturned after a review provided by the underwater camera, and Adams took advantage of her second chance to win with a time of 2:06.80. Hali Flickinger took the second Olympic spot in 2:07.50.

THE U.S. OLYMPIC Committee approved a nearly 25 percent funding increase to the country’s anti-doping agency, choosing money over words in an effort to fix a worldwide system that its CEO, Scott Blackmun, said is broken.

The USOC board approved the increase starting next year from $3.7 million to $4.6 million annually for the U.S. Anti-Doping Agency, which is tasked with testing American Olympic athletes, and international competitors who train in the United States.

KENYAN TRIALS: Sally Kigyego, the 2012 London Games silver medalist, finished sixth in the women’s 10,000 meters and didn’t make the team for Rio.

David Rudisha, the world-record holder and Olympic champion in the 800 meters, qualified for the trials final in his event after winning his semifinal in 1 minute 43.40 seconds. That was Rudisha’s best time of a slow season so far.

Also, the 2015 world silver medalist, Caleb Ndiku, set up another shot at Olympic and world champion Mo Farah in Rio after winning a ferocious men’s 5,000 meters final. Ndiku won a sprint finish over the world championships bronze medalist, Isiah Koech, who also qualified. Kenya’s track federation has yet to announce the wild card in the men’s 5,000.

THE U.S. OLYMPIC roster stands at 299 with more than 200 more athletes still to be named.

Alan Ashley, chief of sport performance for the U.S. Olympic Committee, expects a team of 552 when all the qualifying is complete by mid-July.

MARIA MICHTA-COFFEY and Miranda Melville earned spots on the Olympic team in the 20-kilometer race walk at the U.S. trials.

They finished 1-2 in the race, held in Salem, Oregon, and were the only two who have met the Olympic qualifying standard.

Matthew Forgues of Boothbay was sixth in the men’s race. None of the men reached the Olympic qualifying standard to take part in the Games.

NICK SYMMONDS, the 800-meter runner and an activist for runners, won’t compete at the Olympic trials because of a left ankle injury.

He said he has a torn ligament and a stress fracture. Symmonds, 32, said he isn’t retiring but his season is over.

THE RUSSIAN men’s quadruple sculls team was disqualified from the Olympics for a doping violation, and will be replaced by New Zealand, the world rowing ruling body announced.

MICHAEL PHELPS marked his 31st birthday at the U.S. Olympic swimming trials. Asked how he plans to celebrate, he said, “I’m not.”