Here are attendance figures for the one-year, stopgap, Division II men’s soccer league administered by the United States Soccer Federation when neither the USL First Division nor the nascent North American Soccer League could meet USSF’s Professional League Standards on their own. The two leagues were forced to live together and play nice before setting up shop individually for 2011. What began as USL Pro that year is now the USL Championship and what began as the second NASL that year exists now only in a courtroom.
| USSF D2 Pro League 2010 | G | Total | Average |
| Montreal Impact | 15 | 185,952 | 12,397 |
| Portland Timbers | 15 | 160,899 | 10,727 |
| Rochester Rhinos | 15 | 96,965 | 6,464 |
| Vancouver Whitecaps | 15 | 77,237 | 5,149 |
| FC Tampa Bay Rowdies | 15 | 57,996 | 3,866 |
| Austin Aztex | 15 | 55,990 | 3,733 |
| AC St. Louis | 15 | 41,252 | 2,750 |
| Puerto Rico Islanders | 15 | 35,368 | 2,358 |
| Carolina RailHawks | 15 | 33,611 | 2,241 |
| NSC Minnesota Stars | 15 | 20,608 | 1,374 |
| Miami FC | 15 | 18,809 | 1,254 |
| Crystal Palace Baltimore | 15 | 16,122 | 1,075 |
| USSF D2 PRO LEAGUE TOTAL | 180 | 800,809 | 4,449 |