The United Football League has officially initiated its team expansion process. The league is now welcoming proposals from potential markets interested in spring pro football. The UFL is currently comprised of eight teams: the Arlington Renegades, Birmingham Stallions, Michigan Panthers, Houston Roughnecks, Memphis Showboats, San Antonio Brahmas, St. Louis Battlehawks and D.C. Defenders. The expansion process for the UFL is already in progress, though a specific timeline has not been established.