Trevor Cahill limited Texas to one hit over seven innings and the last-place Oakland Athletics completed a three-game series sweep, their first in more than three months, with a 4-0 victory Wednesday night.
The Rangers are 1-5 on this homestand, and have scored only one run in their four-game losing streak.
Texas, which now has 17 games left, began the day 5 1/2 games behind wild-card leader Boston and six behind the AL West-leading Los Angeles Angels. The Red Sox and Angels played Wednesday night at Fenway Park.