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11/18/11 3:46 PM EST

Astros add Clemens to roster, sign Pendleton

The Astros added right-hander Paul Clemens to the 40-man roster and signed right-hander Lance Pendleton to a Minor League contract with an invite to Spring Training, the club announced Friday.

The 23-year-old Clemens went 8-7 with a 3.81 ERA in 26 starts between Double-A Mississippi, Double-A Corpus Christi and Triple-A Oklahoma City last season. Clemens was a Southern League All-Star and finished 2011 as the No. 5 prospect in the organization, according to MLB.com. He was acquired from the Braves in the Michael Bourn trade.

Pendleton, 28, posted a 6.75 ERA in 15 relief appearances for the Astros and Yankees last season.

Pendleton began his season as a Rule 5 Draft pick by the Astros before being returned to the Yankees during Spring Training. He spent most of his season with Triple-A Scranton/Wilkes-Barre, going 3-4 with a 3.11 ERA in 18 games, including 10 starts. The Astros claimed Pendleton off waivers from New York on Sept. 9, and he finished his season with the Major League club.

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