Left-hander Pedro Figueroa, who has a 1.50 ERA in nine relief appearances over his first two stints with the A's this season, was recalled from Triple-A Sacramento.
The team announced it had placed right-handed pitcher Jim Miller on the paternity list.
Figueroa pitched in eight games with Oakland from April 21 to May 21 but just once during his second callup, from June 17 to 20. In that outing he tossed 3.0 scoreless innings on June 17 against San Diego.
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The 26-year-old left-hander posted a 1.04 ERA in six appearances with Sacramento following his June 21 option and is 0-1 with a 1.67 ERA in 18 relief outings overall with the River Cats. Figueroa has not allowed a home run in 27.0 innings and has held the opposition to a .186 batting average.
The Dominican native was originally signed by the As as a non-drafted free agent in 2003 and was named the As Organizational Pitcher of the Year in 2009 after combining for a 13-6 record and a 3.38 ERA in 27 starts with Single-A Kane County and Single-A Stockton.
Figueroa had Tommy John surgery in June, 2010 and missed nearly the entire 2011 season before making two starts with the As affiliate in the Arizona Rookie League last August.
Miller is 2-1 with a 1.78 ERA in 19 relief appearances with Oakland. Opponents are batting .217, including .122 by left-handed hitters. He has tossed two or more innings in seven of his 19 games.