The Cubs recalled right-handed pitchers Alberto Cabrera and Chris Volstad from Triple-A Iowa and optioned right-handed pitcher Casey Coleman.
Cabrera has never appeared in the big leagues. He has a combined 4-1 with five saves and a 3.11 ERA in 36 appearances between Double-A Tennessee and Iowa this season.
Cabrera originally signed with the Cubs as an undrafted free agent on July 7, 2005.
Volstad returns to the Cubs for the third time this season. He was optioned to Iowa on May 18 after beginning the season in the starting rotation. Volstad is 0-7 with a 7.94 ERA in nine starts with the Cubs. He was acquired from the Miami Marlins on January 5 for right-handed pitcher Carlos Zambrano.
Coleman is 0-2 with a 7.40 ERA in 17 appearances, including one start, with the Cubs this season. He returns to Iowa, where he has a 2-4 record with a 5.01 ERA in 11 appearances.