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9/2/2014 1:23 P.M. ET

Astros announce callups, add six to roster

Hoes, Stassi, Villar recalled among series of moves before Lawless' debut

Astros interim manager Tom Lawless will have an extra-long bench to work with in his debut on Tuesday, as Houston announced a series of September callups in advance of its game against the Angels.

The club added six players to the active Major League roster, and right-hander Samuel Deduno -- acquired off waivers on Saturday -- will also be in uniform and available.

Houston recalled outfielder L.J. Hoes, catcher Max Stassi (the club's 19th-ranked prospect) and infielder Jonathan Villar, and it selected right-handers Jorge De Leon and Nick Tropeano (No. 13 prospect) to the Major League roster, while lefty Darin Downs was activated from the 15-day disabled list.

To make room for De Leon and Tropeano on the 40-man roster, the Astros designated right-handers Paul Clemens and David Martinez for assignment.

Tuesday will be the first game for Lawless -- Bo Porter was dismissed from managerial duties on Monday -- and new bench coach Adam Everett. Houston's 40-man roster is full, and the Astros have 32 players on their active roster.

Joey Nowak is a reporter for MLB.com. Follow him on Twitter at @joeynowak. This story was not subject to the approval of Major League Baseball or its clubs.