Decker, who played third base, was 3-for-4 with a double and his 14th homer for two RBIs and three runs scored while raising his batting average to .283. The homer was Decker's franchise-record 147th in his seventh season in the Padres minor league system.
Gyorko (.286) hit his fourth homer since being optioned to the Chihuahuas on June 10.
Right fielder Rymer Liriano (.282) was 2-for-4 with a double, a RBI and a run scored as El Paso scored their sixth win in their last seven games to improve to 37-35.
Right-handed starter Daniel McCutchen (5.