Valdez (15-7) allowed three runs on eight hits and two walks while striking out four over 5.2 innings to earn the win over the Mariners on Tuesday.
Valdez was one out shy of a fifth straight quality start, but he was able to get the win, which also clinched the AL West for the Astros. Over his last five starts, he's allowed five runs across 33 innings with a 30:11 K:BB in that span. The southpaw is now at a 2.91 ERA, 1.11 WHIP and 169:55 K:BB through 176.1 innings across 28 starts this season. Valdez's next start is likely to come in the playoffs. He is on turn to pitch during the wild-card round, as the Astros are locked in to finishing third among the American League's division winners.