McDonald first started curling in 2008. McDonald first represented the United States in international competition as the alternate for the American team at the 2009 World Wheelchair Curling Championship. He then represented the United States as third under skip Augusto Perez in the 2010 Winter Paralympics in Vancouver, where they finished fourth. McDonald became the skip of the United States wheelchair curling team in 2012, and led his team to a fifth-place finish in the world championship. He skipped the United States team at the 2013 World Wheelchair Curling Championship, and led his team to a fourth-place finish after losing in the semifinal to Canada's Jim Armstrong and losing a tight game to China in the bronze medal game. McDonald skipped the United States team at the 2014 Winter Paralympics, and finished tied for fifth after the round robin. He also skipped the United States team at the 2015 World Wheelchair Curling Championship. The United States team had a promising start, winning the first four of five games, but lost the final four games and finished in fifth place.