Junior welterweight titlist Amir Khan took care of business inside the ring on Saturday by retaining his title against Paul McCloskey, but he also took care of business outside of the ring in the days leading up to the fight. Khan has signed a four-fight contract extension with promoter Golden Boy and a parallel four-fight deal with HBO, Golden Boy CEO Richard Schaefer told ESPN.com. Khan's contract with Golden Boy was due to expire following the fight with McCloskey, but Schaefer said they finalized a new deal they had been working on for a couple of months just before the fight. Read more: http://sports.espn.go.com/sports/boxing/news/story?id=6391147