USL PRO is the strongest, most sophisticated and most experienced North American mens professional soccer league below MLS, both on and off the field. Focused on franchise stability and longevity, USL PRO features 12 teams in 2011 and an unprecedented six teams with more than a decade of operational experience. The league is focused on aggressive but deliberate growth by adding teams fully capable of meeting USL and USSF standards, which are located in markets that further promote regional league play. In addition to league play, USL PRO teams will compete in the Lamar Hunt U.S. Open Cup as well as various domestic and international exhibitions. USL PRO is affiliated with the U.S. Soccer Federation.