In 2015, Rusheen qualified for the 15th World Championships in Athletics after placing second in the 400 metres at the Jamaican National Championships, with a time of 44.73 seconds. Two months after, in the 400 heats at the World Championships, Rusheen placed second with a time of 43.93 seconds breaking Jermaine Gonzales's Jamaican record. As of 2018, his time ranks him in the top 15 in history.