The Astros designated righty Roberto Hernandez for assignment to open a roster spot for Jed Lowrie, tweets Brian McTaggart of MLB.com. Lowrie will start tomorrow for the Astros at third base, after recovering from May thumb surgery.

The Astros signed Hernandez to a minor league deal in February, and he made the team out of spring training. His contract was worth $2.65MM. Hernandez, 35 in August, posted a 4.36 ERA, 4.5 K/9, 2.8 BB/9, 0.96 HR/9, and 51.9% groundball rate in 84 2/3 innings, including 11 starts.