This photo provided by Kevin Snyder show Kyle Snyder's damaged gold metal from the 2016 Rio Olympics on Tuesday, May 23, 2017, in Maryland. The medal will soon replaced by the IOC and Rio organizers because of damage. Snyder and Helen Maroulis, another U.S. gold medalist wrestler, are among a group of more than 100 athletes from around the world with defective Olympic medals. (Kevin Snyder via AP)

This photo provided by Kevin Snyder show Kyle Snyder's damaged gold metal from the 2016 Rio Olympics on Tuesday, May 23, 2017, in Maryland. The medal will soon replaced by the IOC and Rio organizers because of damage. Snyder and Helen Maroulis, another U.S. gold medalist wrestler, are among a group of more than 100 athletes from around the world with defective Olympic medals. (Kevin Snyder via AP)

More than 80 American athletes have sent medals they won at the Rio Olympics to U.S. Olympic Committee headquarters to be shipped to games organizers, who will replace them due to flaking, black spots and other damage, the USOC said Tuesday.

The Americans, including gold-medal wrestlers Kyle Snyder and Helen Maroulis, are among at least 100 Olympians from across the globe with defective medals.

Beach volleyball star Kerri Walsh Jennings is also among the group; she says her bronze medal is flaking and rusting, and USA Swimming spokesman Scott Leightman said some swimmers have damaged medals as well.

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The USOC learned about the problems in December and reached out to all the American sports federations in January to begin the process.

Rio Games spokesman Mario Andrada said officials have noted problems with the covering on 6 to 7 percent of the medals.

“The most common issue is that they were dropped or mishandled, and the varnish has come off and they’ve rusted or gone black in the spot where they were damaged,” Andrada said.

It’s not uncommon for medals to be passed around at post-Games parties and handled by hundreds. But this amount of damage is unusual.

Walsh Jennings, who won three golds in previous Olympics, says her medals tend to get beaten up because she doesn’t hesitate to let people touch them or try them on. But she won’t consider locking them up because people are inspired by them.

“They’ve offered to replace them. I’m not sure if I want to swap it out,” Walsh-Jennings told The Associated Press, adding the reason was “100 percent sentimental.”

USA Basketball spokesman Craig Miller said the organization reached out to its players and seven — three men and four women — reported they believe there is an issue with their medals.

Snyder, who wrestles for Ohio State, was 20 when he won his medal. He noticed an issue with the award the day after he won it.

He went to a party at the Team USA house in Rio, where he said multiple people handled the medal as they celebrated. Snyder said he later discovered a scratch on the back of it, though he added there has been no further damage.

Snyder said he has until the end of the week to return his gold medal and has no idea when he’ll receive his replacement.

“It wasn’t too big of a deal,” Snyder said. “But since they’re giving me a new one, it’s kind of cool.”

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Rio de Janeiro spent about $12 billion to organize the games, which were plagued by cost-cutting, poor attendance and reports of bribes and corruption linked to the building of some Olympic-related facilities.

Nine months later, many of the venues are empty and have no tenants or income — with the maintenance costs dumped on the federal government. In addition to the issues with the medals, which featured the Rio and Olympic logos, the local organizing committee still owes creditors about $30 million

Greg Massialas, a national coach for the U.S. fencing team in Rio, said in a message to AP that the silver medal his son, Alex, won is damage free. He added that he hasn’t heard about any issues with other American fencers.

U.S. shooter Ginny Thrasher and boxer Claressa Shields, along with men’s tennis bronze medalist Kei Nishikori of Japan, also reported that their gold medals are intact.

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AP Sports Writers Jimmy Golen in Boston, John Marshall in Phoenix, Howard Fendrich in Washington, Greg Beacham in Los Angeles and Brian Mahoney in New York contributed to this story.