Wei-Yin Chen allowed three runs over 7 1/3 innings in a win over the Astros on Tuesday. Chen struck out nine in the outing, aided by an Astros lineup that has struck out more than any team in baseball. He allowed seven hits and a walk in the outing. The lefty now has a 6-3 record and 2.87 ERA in 12 starts this season. His next start will come Sunday against the Mariners.