Deen enjoyed a strong start to the 2014-15 season, scoring a third and a first place in the opening two four man races of the Americas Cup at the Park City track and winning another race at the following meeting at the Calgary track. At the 2015 FIBT World Championships, Deen led crews to fifth place in the four-man event, 14th in the two-man event and eighth along with the rest of the British squad in the team event.