(Houston, TX)  --  The Mariners are hoping to salvage a split with the Astros in their four-game series after losing again in Houston, 2-1.  Hisashi Iwakuma gave up one home run each in the third and sixth innings yesterday and took the loss.  Danny Valencia had an RBI in the 4th to account for Seattle's lone run.  The two teams will play again tonight at Minute Maid Park.