Hardee was the runner-up in the decathlon at the 2008 US Olympic Trials and made his first Olympic team. At the Olympics, he was in 4th place through seven events when his no-height score in the pole vault cost him a chance to medal. His performances during the 2008 outdoor season garnered interest from the New York Jets of the National Football League, who offered him a tryout. However, he expressed no interest in pursuing the opportunity.