Sports Fan-Attic

The Sports Authority. Sports Authority) is headquartered in Englewood, Colorado. It operates over 450 stores in 45 U. S. States under The Sports Authority. The Company's website, situated at sportsauthority.com is run by GSI Commerce. Sports Authority has a rich history, dating back almost a century, of being an industry leader in delivering a huge assortment of quality, brand-name sporting goods.