The Arizona Diamondbacks, still trying to do more than run in place, return home Thursday for the start of a four-game series against the San Francisco Giants, a fellow chaser in the National League wild-card race. Arizona goes into the set in Phoenix coming off a 7-6 walk-off loss at Colorado on Wednesday, failing in a bid to get to three games over .500 for the first time since mid-June. Nolan Arenado's two-run homer off recently installed closer Archie Bradley sunk the D-backs in the ninth inning.