Right-hander Sam Deduno, who was picked up off waivers, will also join the team Tuesday, giving the Astros' bullpen some much-needed help. Astros relievers had thrown the fourth-fewest innings among AL relief corps entering Sunday, but several arms are in uncharted territory as far as innings worked.
"Extra arms will definitely help this time of year because the guys we have down there who have been mainstays throughout the course of the year, they've been asked to pick up a lot of innings," Porter said. "Any chance you have to give those guys a blow will be good."
When the majority of callups arrive in Houston depends on whether Triple-A Oklahoma City makes the playoffs. The RedHawks entered the penultimate day of the regulars season Sunday one-half game behind first-place Omaha in the American North Division of the Pacific Coast League.
Among the other players expected to get called up are relief pitcher Paul Clemens, outfielder L.J. Hoes, catcher Max Stassi and shortstop Jonathan Villar.
Brian McTaggart is reporter for MLB.com and writes an MLBlog, Tag's Lines. Follow @brianmctaggart on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.