The American Outlaws have pretty much dominated all aspects of US Soccer support over the last few Word Cup cycles, but not without controversy. In an excellent piece by Noah Davis in March of last year, the organization was put under the microscope for its handling of racism and sexual assault, leading many around the country wary of buying their next AO ticket and looking for alternative groups.
One such group which has been gaining a bit of steam of late are the Sammers. The name, group leader Monty Rodgriguez, tells me is a bit of "an unintentional homage [to Sam's Army].