 Mariners and Astros won't meet again until the 10 Ultimate Series of the season this weekend. Looming large, to say the least, with that one-game lead in the AL West. It's going to be Luis Castillo. He set the stage for the Mariners' series opening wins in his last two starts against the Angels and the Blue Jays. He'll make his second start this season against Houston. Hunter Brown was also the opposing pitcher back on May 28th, the last time the Astros were in town for that four-game series.