High Quality Content by WIKIPEDIA articles! USSF Division 2 Professional League (D2 Pro League) was a temporary professional soccer league created by the United States Soccer Federation (USSF) in 2010 to last just one season. The twelve-team league was formed as a compromise between the feuding United Soccer Leagues (USL) and the North American Soccer League (NASL). The D2 Pro League was the second tier of the American and Canadian soccer pyramids below Major League Soccer.