In 2021, the Ontario Jr. Reign joined the Pacific Division of the United States Premier Hockey League (USPHL), which operates in 24 of the 50 United States. The league is currently the largest amateur ice hockey league in the United States. The USPHL has more than 600 teams with athletes in the USPHL Premier who are 16 to 21 years of age. Overall, the USPHL has had over 2,500 athletes advance to the collegiate level and NHL.