Dan Haren just might be a pitching coach’s best friend. The Diamondback right-handed All-Star started out 20 of the 24 batters he faced with a first-pitch strike. It put the San Diego Padres in a hole all game in the Diamondbacks’ 6-3 win at sold-out Chase Field on Opening Day. Haren was about as efficient as can be as he went seven innings for the win, throwing 92 pitches while allowing three hits, one earned run, no walks and struck out four before 41,972 fans. Haren, who threw a nifty 92 pitches, took a one-hitter into the seventh when Adrain Gonzalez doubled and Chase Headley singled him home to close within 6-1. Gonzalez and Kyle Blanks added back-to-back solo home runs in the ninth off of reliever Bobby Howry to close within 6-3, but the Padres managed just five total hits. Offensively, the Diamondbacks got to former teammate Jon Garland (0-1) by loading the bases in the first that catcher Miguel Montero cashed in with a two-run single Mark Reynolds added a two-run home run in the third and Stephen Drew had two-run inside-the-park home run in the fourth. Right-fielder Justin Upton joined Montero and Drew with multi-hit games to pace the Diamondbacks’ eight hit attack again four relievers.