Damian Warner surpassed all expectations when he finished fifth in his Olympic debut in the gruelling two-day decathlon at the London 2012 Games. His result was the second-best ever by a Canadian decathlete in Olympic competition, while his personal best score of 8442 is also the second-best mark all-time by a Canadian. Warner beat his previous top score by more than 300 points, thanks to personal best marks in six of the ten events (400m, 1500m, high jump, long jump, discus, javelin).
Warner won his first of three consecutive Canadian decathlon titles in 2011. That same year he made his world championship debut, finishing 18th. In 2013 Warner won the prestigious Hypo-Meeting in Götzis, Austria.