 Upon returning from the World Junior Championships with a gold medal, Mason was briefly recalled by the Blue Jackets on an emergency basis in February, but did not appear in a game and was quickly returned.Mason suffered a knee injury towards the end of the regular season, but with the playoffs approaching, he tried to play through it for several weeks.After defeating the Plymouth Whalers in the first round, Mason was pulled out of the line-up and underwent arthroscopic knee surgery on April 18, forcing him to miss the remainder of the OHL playoffs, as well as the 2008 Memorial Cup.