(Chicago, IL)  --  A five-run seventh inning and a Seattle error led the Cubs to a 5-1 win over the Mariners at Wrigley Field.  The M's scored first as Dee Gordon hit an RBI double in the fifth.  Matt Wisler took the loss for Seattle, which is three losses away from playoff elimination.  Starter Justus Sheffield threw five shutout innings, giving up just five hits and striking out seven, but earned a no-decision.