USARL membership was in flux since the announcement of the North American Rugby League in Spring 2021. Atlanta Rhinos, Boston 13s and Philadelphia Fight left USARL to be founding members of the new competition. White Plains folded after NARL established the New York Freedom. Northern Virginia folded after most of its players joined the newly established DC Cavalry in NARL. Lakeland Renegades suspended operations due to the COVID-19 pandemic.
The 2021 USARL season was contested by six teams. Philadelphia and Delaware in the North; Tampa, Jacksonville, Southwest Florida Copperheads, and South Florida Speed in the South.[1][2]