Graveman struck out three over 1.1 innings in Friday's 9-6 win over the Giants.
The Astros desperately needed a bullpen upgrade, which is why the traded for Graveman, who rewarded his new team in his debut. The right-hander entered in the seventh inning with trouble afoot -- runners on first and second after San Francisco closed its deficit to 7-5 -- and got out of the jam. He dispatched all three Giant batters in the eighth via the strikeout. Graveman will be the bridge to closer Ryan Pressly and likely get save opportunities when Pressly is unavailable.