Amateur League - Professional Development League (PDL)

The USL Premier Development League (PDL) is the amateur league of the United Soccer Leagues in the United States and Canada, forming part of the American Soccer Pyramid. It is currently the top level men's amateur competition in the United States, and has 63 teams competing in four conferences, split into eight regional divisions; unofficially, it is considered to be the fourth tier of competition, behind Major League Soccer, the USL First Division and the USL Second Division, and equal with the National Premier Soccer League and the Pacific Coast Soccer League.

While not strictly a "professional" league, the PDL prides itself on its professionalism, and its dedication to developing young soccer players, preparing them for future careers in professional leagues in the United States and elsewhere. As PDL seasons take place during the summer months, the player pool is drawn mainly from elite NCAA college soccer players seeking to continue playing high level soccer during their summer break, which they can do while still maintaining their college eligibility. In addition, PDL squads often also include standout high school and junior club players, as well as former professionals seeking to continue competing at a high level. PDL rules dictate that a maximum of eight players on each team's 26-man roster can be over 23 years old, while at least three players on each team's roster must be 18 or younger.

Increasingly, the PDL is seen as a 'shop window' for professional clubs looking to discover and identify aspiring professional players who may enter the MLS SuperDraft in future years. Many of the players currently playing in Major League Soccer and elsewhere began their careers in the PDL.