While the Los Angeles Dodgers and Colorado Rockies are headed for the playoffs, the Diamondbacks will return to Phoenix on Sunday night after a horrible September cost them a shot at the National League West title. Arizona led the division for 125 days this season. The Diamondbacks will finish third in the NL West, although Saturday night's 5-4 win at Petco Park assured them their first back-to-back winning seasons since 2007-2008.