Christian Walker homered and Zach Cole hit an RBI single in the 10th inning that lifted the Houston Astros to a 4-3 win over the Seattle Mariners on Wednesday night. Brice Matthews started the 10th as the automatic runner on second base and moved to third on a wild pitch by Alex Hoppe (0-1). Cole, who tied a career high with three hits, singled on a grounder to right field to send Matthews home.