Oakland has been eliminated from first place.

To show that Oakland is eliminated from first place, we start with the current standings:
            Team	W	L	GL	PCT	GB
         Seattle	82	68	12	0.547	0.0
         Houston	82	69	11	0.543	0.5
           Texas	79	72	11	0.523	3.5
         Oakland	70	80	12	0.467	12.0
     Los Angeles	69	81	12	0.460	13.0
           Total	382	370	58

Oakland can finish the season with at most 70 + 12 = 82 wins.
Seattle already has 82 wins.
  Seattle has 7 wins and 6 losses against Oakland with 0 games left in the series.
  Oakland has lost the head-to-head tiebreaker with Seattle.

# Oakland Athletics' magic number
# Oakland's magic number
# Athletics' magic number
# MLB Playoff Race