When Edinson Volquez is at his best, it's more than just his fastball and changeup that he can consistently throw for strikes. Volquez's curveball has to be effective, and it was Tuesday night. "That's as good a hook as he's had all year," San Diego manager Bud Black said. "When (Volquez) is on, it's the three-pitch mix in the strike zone. I thought today the curveball really came into play and was really effective." Volquez pitched into the eighth inning in his longest outing of the season, Jedd Gyorko and Alexi Amarista each homered, and the San Diego Padres beat the Seattle Mariners 6-1 on Tuesday.