(Oakland, CA)  --  The Astros and A's split a doubleheader in Oakland on Tuesday.  Khris Davis homered and doubled for the A's in a 4-2 win to start the day.  Frankie Montas earned the W while Zack Greinke took the loss.  The Astros erased a four-run deficit to win the nightcap 5-4.  Yuli Gurriel drove in the go-ahead run on a sac-fly in the seventh.  Matt Olson homered in the loss for the A's, who lead the AL West at 25-and-15.  The series continues tonight.