(Oakland, CA)  --  The Seattle Mariners are getting ready for their home opener after losing to the Oakland A's, 6-3.  It was a rough start for Erasmo Ramirez, who gave up five runs on seven hits over four innings.  Robinson Cano had a double in the third inning and scored a run for Seattle.  The Mariners will play the L.A. Angels at Safeco Field tomorrow night in the first game of a two-game series.