Dylan Armstrong of Kamloops is the country's best hope for a gold medal in London. Here are some facts on the men's shot put:
The winning mark has been in excess of 21 metres in each of the past 10 Olympics, dating back to 1972.
Armstrong's personal best is 22.21 metres.
The United States has won 16 of 28 gold medals in the event. No other country has won more than two. The Americans have won 47 of 78 medals in the event and, other than the boycotted Moscow Olympics, have been shut out just twice: Berlin (1936) and Montreal (1976).
Defending champion Tomasz Majewski of Poland is bidding to become the third man to win two gold medals. The others are Americans Ralph Rose (1904, 1908) and Parry O'Brien (1952, 1956).
David Storl, a heavy metal-loving police cadet from Germany is the reigning world champion and had a throw of 21.58 metres at this year's European championships. The bad news for Storl is no reigning world champ has ever won Olympic gold, and only one got silver (John Godina, U.S., 1996).