Foscue started at first base and went 0-for-2 with a walk and a run scored in Sunday's 6-4 extra-inning win over Oakland.
While the Rangers have not yet been eliminated from the postseason, the club faces a long haul -- 9.5 games back of the third wild-card spot -- over the final month. That suggests opportunities for prospects like Foscue, who could get some run at first base ahead of Nathaniel Lowe, whose contract expires this offseason.