Conor McGregor, who will make his return to fighting this weekend, took human growth hormone and anabolic steroids after recovering from a broken leg, people with knowledge of the matter said. The Ultimate Fighting Championship star Conor McGregor has defended his use of banned performance-enhancing drugs in the wake of the revelation last month that he used the substances. McGregor, along with the U.F.C. and his surgeon, has cast the deci... [1091 chars]