This is the first trip to the Major Leagues for Rojas, a 25-year-old defensive specialist.
Arruebarrena, signed during Spring Training, was promoted from Albuquerque when third baseman Juan Uribe was injured, but Arruebarrena was used primarily to back up veteran Hanley Ramirez. Arruebarrena, known for his glove, went 4-for-13 (.308).
Most of those at-bats came when he filled in after Ramirez strained his left calf, but with Ramirez back in the lineup, club officials want Arruebarrena to be playing regularly, not sitting.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.