ALBERTA, CANADA – 27-year-old “The Ultimate Fighter 6″ veteran Richie “The Dirty Samurai” Hightower (8-3) has signed a three-fight deal with Canada’s premiere MMA promotion, Maximum Fighting Championship, according to the company. The first fight on Hightower’s new contract will take place at “MFC 25: Vindication” in Edmonton, Alberta, on May 7, where he will face