(Seattle, WA)  --  The Mariners continue to struggle at home, getting dealt a 5-0 loss by the Oakland A's.  But Seattle remains in first place in the AL West by a game-and-a-half over Texas.  Starter Taijuan Walker had his fourth loss of the season as the Mariners were unable to score, despite nine hits.  Seattle and Oakland will play again tonight at Safeco Field.