Josh Donaldson (hamstring) indicated Friday that he is no longer experiencing knotting in his hamstring, and expects to return to the lineup on Saturday. He could even be available to pinch-hit in Friday's game. The 27-year-old is in the midst of a true breakout season, hitting .310/.377/.500 with nine homers and 42 RBI, and has been one of the primary driving factors of the A's success this season.