Alistair Brownlee, Great Britain. Age at the Olympics: 24
Even with his recent Achilles injury, two-time and reigning world champion Alistair Brownlee is still the odds-on favorite for gold in London this summer. After all, he’s almost always injured during the winter, and he proved his ability to bounce back from a big winter injury when he won the World Triathlon Series Grand Final in Budapest, Hungary, in early September of 2010 despite being out for most of the winter with a stress fracture. (In fact, he won the Madrid leg of the World Triathlon Series in 2010 despite almost no training at all.) But what makes the oldest Brownlee so dangerous is his ferocity—he isn’t afraid of anyone, and he’ll literally kill himself to win. Combine that with his enormous talent, his fearless racing style, his willingness to take risks, and his ability to handle pressure, and you’ve got someone who just might do something no triathlete ever has: win gold as the gold medal favorite.