The Mid-American Conference was founded as a five-school league on February 24, 1946 in Columbus, Ohio with Ohio, Butler, Cincinnati, Wayne State and Western Reserve admitted as charter members. The Mid-American Conference has 12 full-time schools and a 13th, Temple, for football only, effective 2007. Over the span of 59 years, the Mid-American Conference has progressively grown and developed into one of the most aggressive Division I conferences in the country. The current members are located mainly in the Midwestern United States; nine of the schools are in Ohio and Michigan alone. The 12 current member institutions have a total enrollment of better than 310,000, with individual enrollments ranging from 16,000-38,000. The MAC's overall enrollment makes it the fourth-largest conference in the United States. The Conference blasted its way onto the national scene back in 2003 when five teams upset nationally known top 25 teams in non-conference play. A pair of MAC squads finished in the top 25 that year, and names such as Ben Roethlisberger, Byron Leftwich, and Chad Pennington have all gone on to have solid careers in the NFL.