The Sioux City Explorers are a professional baseball team based in Sioux City, Iowa, in the United States. The Explorers are a member of the Central Division of the American Association of Independent Professional Baseball, which is not affiliated with Major League Baseball. From their inception in 1993 to the present, the Explorers have played their home games at Lewis and Clark Park. The Explorers, frequently called the X's, have played in the American Association since 2006.