(Oakland, CA)  --  Chris Bassitt fired seven shutout innings as the A's blanked the Astros 6-0 in Oakland.  Bassitt improved to 3-and-2, and Sean Murphy plated three runs on a homer and a two-run single for the A's.  They are four-and-a-half games ahead of Houston for the divison lead.  Frankie Montas takes the mound against Zack Greinke today.