Nolan Arenado homered and moved closer to 2,000 hits, and Merrill Kelly combined with two relievers on a three-hitter for the Arizona Diamondbacks, who beat the San Diego Padres 3-1 on Thursday night to take three of four. The Diamondbacks and Padres are jockeying for second place in the NL West, well behind the two-time defending champion Los Angeles Dodgers. Arizona popped back into a tie with San Diego, 14 1/2 games behind the idle Dodgers.