The U.S. men's volleyball team was the defending gold medalists, but they failed to medal in London.
Upsets are a common thing in the Olympics, especially in the team sports.
But, there are some teams that you expect to hang around longer than they did. Some teams were put out earlier than expected, while others decided not to show up to London at all (figuratively speaking).
Here's a look at the most disappointing team showings at the Olympics.
Although Brazil made the gold medal game, it was still a disappointment to not win the gold over Mexico.
Prior to the Olympic final, Brazil had outscored its opponents 15-5, including a 3-0 win over South Korea in the semifinals.
However, Mexico kept the Brazilians at bay in the gold medal match, winning 2-1.
The only goal the Mexicans allowed was in extra time. Other than that, the Mexicans controlled the game throughout.
The loss kept the Brazilians from winning their first Olympic gold, which is surprising considering they've won five World Cup titles.
Both U.S. men's outdoor volleyball teams failed to make the semifinals.
Todd Rogers and Phil Dalhausser were the defending Olympic gold medalists in beach volleyball from Beijing.
In London, while both teams were favored to win medals, neither came away with one.
Rogers and Dalhausser were eliminated by Italy's Daniele Lupo and Paolo Nicolai in the round of 16.
The other American team of Jake Gibb and Sean Rosenthal were ousted in the quarterfinals by Latvia's Martins Plavins and Janis Smedins.
With the U.S. not winning a medal, it marks only the second time they haven't won a men's beach volleyball medal since it became an Olympic sport in the 1996 Atlanta Olympics.
The Chinese were disappointed with not medaling in the women's team competition after winning gold in the 2008 Olympics.
So much for being the defending gymnastics team gold medalists.
China was expected to contend for a medal in the team competition, but struggled throughout to take fourth.
While the U.S., Russia and Romania were no slouches, the fact that the Chinese failed to win a team medal was very surprising.
The Chinese scored 174.430 in the team final, almost two points behind Romania in third place.
Where the team struggled was on the floor exercise and vault. On the floor they scored a seventh-best 40.833, while they scored a fifth-best 44.266 on the vault.
Couple that with a fourth-place team finish on the balance beam, and it's clear why they didn't take home a medal in the team competition.
The only solace the Chinese can take away is that they won three individual medals. But, that's a disappointment as well, considering they took home five individual medals in Beijing.
The U.S. men again failed to medal in boxing, having only seen one medal come their way since the 1996 Olympics.
To say the U.S. Olympic Committee is disappointed in the U.S. men's boxing team for bringing home no medals (again) is an understatement.
The U.S. failed to bring home a boxing medal for the second-straight Olympics, prompting a response from the USOC.
According to the Associated Press:
The U.S. Olympic Committee is so disappointed by its medal-less men's boxing team that it will make changes to the sport's national governing body.
USOC CEO Scott Blackmun offered no specifics Saturday, although it's clear far more is expected from U.S. fighters, who left the Olympics empty handed for the first time in team history.
"We're going to sit down and take a hard look at why we are where we are, and make some changes," Blackmun said at a news conference where the U.S. Olympic Committee began wrapping up the London Games, which close Sunday. "I don't want to say anything beyond that."
Obviously some changes are going to have to be made.
What is the most disappointing is that USA Boxing has a rich tradition, but continues to struggle at the Olympics.
The U.S. men's volleyball team was expected to follow up their gold from Beijing, but failed to make the semifinals.
The U.S. men's indoor volleyball team took gold in the 2008 Olympics.
In London, they went 4-1 in pool play, with their only loss coming to Russia. This came after they won the first two sets, only to let the final three sets slip away from them.
Then, in the quarterfinals against Italy, the U.S. struggled once again as they had trouble handling the Italians' serve and finding the floor. For the match, Italy had nine aces, while the U.S. had two.
One thing the loss showed us was there was a carry-over after the disappointing loss to Russia.
Four badminton teams were disqualified from the Olympics for trying to throw pool-play matches.
Most people will agree with these four women's doubles badminton teams being tied at No. 1 in the rankings.
When teams try to throw matches to get more favorable matchups in the knockout round, it's sickening. When four teams do it, there is something wrong with the sport.
The teams were from China, Indonesia and South Korea. Two of the teams were from South Korea.
A bigger detriment to the sport was the fact that the Chinese were ranked No. 1 in the world, while one of the South Korean teams was ranked No. 3.
The four teams were cited for "conducting oneself in a manner that is clearly abusive or detrimental to the sport," by the Badminton World Federation.
It was nice to see all four teams disqualified. But it left such a disappointing finish to the women's doubles as the other Chinese team (ranked No. 2 in the world) had no problems on their way to the gold medal.