Jeff Gross/Getty ImagesNed Colletti is beginning his sixth season as Dodgers general manager. The team has averaged 86 regular-season victories during his tenure.Ten days.The Dodgers rose from the basement of the National League West in May to the best record in the league in June, then sat only two games out of first place in the division at the All-Star Break.Yet as far as Dodgers general manager Ned Colletti was concerned, it was almost a mirage. During an interview at his Dodger Stadium office last week, Colletti fully acknowledged that the Dodgers' second-half fade, as much as he and everyone else tried to reverse it, came as disturbingly little surprise to him.2010 NL WestBefore All-Star Break51-37 San Diego49-39 Dodgers49-39 Colorado47-41 San Francisco34-55 Arizona2010 NL WestAf