The only sport the US does not compete in at any Summer Olympics (including 2008 and the upcoming 2012) is handball.
He is a speed skater which means he participates in a winter sport.
Technically no. The Olympics are for "amateur" atheletes, those who do not make their livelyhood by the sport they compete in.
Wrestling is a Summer Olympics sport.
All of them.
Baseball
wrestling
Swimming.
433 athletes will represent Australia at the 2008 Summer Olympics. Click on the 'Australian Athlete Bios' link below to read about them, sorted by the sport they will compete in.
Karate is not an Olympic sport.
Basketball
snowboarding