During qualifications the US qualified in first place to the team final. Individually McCallum qualified as the second reserve to the vault final and placed seventh on floor exercise, but did not qualify due to teammates Biles and Hurd scoring higher. During the team final McCallum competed on only vault and floor exercise. She contributed 14.533 and 13.633 respectively towards the USA's team total. USA won gold with a score of 171.629, 8.766 points ahead of second-place Russia, beating previous margin of victory records set in the open-ended code of points era at the 2014 World Championships (6.693) and the 2016 Olympic Games (8.209).