text: Melvin Faces Major Challenge in Arizona (AP) AP - After the Wally Backman fiasco, the Arizona Diamondbacks were fortunate to have a handy and willing backup choice in Bob Melvin. The low-key Melvin so coveted the managing job that he brushed aside any concern about being the team's second choice. "This is the one I really wanted," he said. "This is where I feel most at home." That home, though, is in disarray.