(Seattle, WA) -- The Mariners will host the Astros again tonight for the third of their four-game series at T-Mobile Park. Mike Leake will start for Seattle. He's 4-and-6 on the season. Houston counters with Brad Peacock. The Mariners are last in the AL West at 25-and-39, while the Astros lead the division at 42-and-20.