The Athletics built their advantage early and never let San Diego catch up, winning 5-2 at Petco Park behind a four-run opening burst that proved enough to withstand a late Padres rally.
Carlos Cortes led Oakland's attack, going 2-for-4 with a home run and an RBI while drawing a walk. The outfielder is batting .350 with 5 home runs and 17 RBIs this season. Jacob Lopez earned the victory with 4.2 innings of work, allowing 1 run on 6 hits with 3 strikeouts and 1 walk to improve to 4-2 with a 5.73 ERA.
Oakland struck first when Cortes homered to right center in the opening inning. The Athletics extended their lead in the second as Henry Bolte doubled to left to score Zack Gelof, then Williams singled to left to bring Bolte home. A wild pitch by Michael King in the fourth allowed Jonah Heim to score, pushing the lead to 4-0.
San Diego finally answered in the sixth when Manny Machado hit a sacrifice fly to left to score Miguel Andujar. Ty France cut the deficit to two with a solo home run to right in the seventh, going 2-for-4 with 1 RBI. But Tyler Soderstrom's RBI single in the ninth provided Oakland with crucial insurance. King took the loss, allowing 4 runs on 5 hits over 3.2 innings with 4 walks and 4 strikeouts. Scott Barlow recorded his first save of the season.
Oakland snapped a two-game losing streak to improve to 26-26. San Diego's winning streak ended at two games, falling to 31-20.