A sprinter on the track, Barnett won 200m silver at the 2006 IAAF World Junior Championships. He went on to compete at the 2007, 2009 and 2011 IAAF World Championships. At the 2007 Pan American Games he was a member of the Canadian 4x100m relay team that captured silver. He represented Canada at Beijing 2008 but did not finish his 200m heat.
Feeling that his running abilities would transfer well to bobsleigh, Barnett decided to give the ice track a try. Named to the national development team, he made his competitive debut in November 2013 at the North American Cup stop in Calgary, helping push Justin Kripps to four-man silver. He made his World Cup debut less than two weeks later, also in Calgary, pushing Kripps to a 13th place finish in the two-man event.
During the off-season enjoys playing video games and eating whatever he wants…Favourite Olympic memory is being in the Olympic Village at Beijing 2008 and watching Usain Bolt break the world record with his hand hitting his chest before the finish line… Favourite motto: You can do anything you put your mind to…