The Athletics finished off a three-game sweep of the Indians with a 7-2 win in Cleveland.
Nick Hundley and Mark Canha both hit solo home runs for Oakland, which won its sixth straight overall. Canha drove in three, while Hundley and Robbie Grossman both had two RBI in the victory.
Frankie Montas struck out nine over six scoreless innings as he moved to 6-and-2 with the win.
Jake Bauers belted a two-run homer in the eighth for the Tribe, which had won four-of-five before this series.
Jefry Rodriguez was tagged for five runs, four earned, in four frames as he fell to 1-and-4.