The Olympic men's soccer competition is a U-23 tournament with one exception—each team is allowed three players over 23.
A quick look now at the over-age players Mano Menezes has named to Brazil's 52-man preliminary roster for the 2012 Olympic games.
Adriano (Defender/midfielder, Barcelona, Spain)
The Barcelona reserve is versatile, but has made little impact on the international level since helping Brazil win the U-20 World Cup in 2003.
Daniel Alves (Defender, Barcelona, Spain)
According to CNN's Paul Gittings, Daniel Alves will be competing with Manchester United's Rafael for the right back position. Rafael, however, is under age, putting the onus on Daniel Alves to prove his worth.
David Luiz (Defender, Chelsea, England)
The center back plays club with London-based Chelsea and has been a lineup fixture ever since transferring in January 2011.
Dede (Defender, Vasco, Brazil)
His work for the Rio-based club Vasco has drawn rave reviews. According to The Daily Mail's John Edwards, Manchester United and Portugal's Benfica are hot on his trail. Were he born six months later, Dede would be eligible for a traditional roster spot.
Diego Alves (Goalkeeper, Valencia, Spain)
He was the backup keeper for Brazil at the Beijing Games. Bleacher Report columnist Mohamed Al-Hendy calls him the best penalty kick saver in the world.
Elias (Midfielder, Sporting, Portugal)
Elias' time with Corinthians in the Brazilian league coincided with Mano Menezes' tenure as manager. Might the prior relationship help his cause?
Fernandinho (Midfielder, Shakhtar Donetsk, Ukraine)
Shakhtar Donetsk has won four Ukrainkian Premier League titles since the speedy Fernandinho joined ranks in 2005.
Hernanes (Midfielder, Lazio, Italy)
According to The Daily Mail's Ashley Gray, Lazio is looking to move the versatile midfielder, perhaps to a deep-pocketed EPL team like Arsenal or Tottenham.
Hulk (Attacker, Porto, Portugal)
The burly striker has scored 46 goals since joining Porto in 2008.
Jefferson (Goalkeeper, Botafogo, Brazil)
He's 29 and has been used sparingly by the national team.
Jonas (Attacker, Valencia, Spain)
His superb work with the Brazilian club Gremio prompted a jump to Spain in 2011. He's been a regular for Valencia over the past year.
Julio Cesar (Goalkeeper, Internazionale, Italy)
Julio Cesar has been Brazil's starter in goal for almost five years. But he's 32, and manager Mano Menezes could decide if it's time to test youngsters like Rafael Cabral.
Luisão (Defender, Benfica, Portugal)
The seasoned center back has been a reserve in two World Cups.
Marcelo (Defender, Real Madrid, Spain)
In 2011, Diego Maradona called Marcelo the Spanish league's third-best player after Lionel Messi and Cristiano Ronaldo. So he's a lock for the roster, right? Not in talent-rich Brazil, where even 23-year-old superstars have to look over their shoulders. Were Marcelo eight months younger, he'd be age eligible.
Ronaldinho (Attacker, Flamengo, Brazil)
When Brazil announced its preliminary roster, Ronaldinho's inclusion stole headlines. He has Olympic experience—having played over age in 2008—and he carries the kind of celebrity that could light up this tournament. I expect his roster fate to be the number one story out of Brazil camp leading up to London.
Thiago Silva (Defender, Milan, Italy)
The AC Milan standout says he wants to play in the Olympics and his inclusion looks like a strong possibility according to the Associated Press .