Former All-Star closer Rafael Soriano, who signed a Minor League contract with the Cubs in June, was promoted to Triple-A Iowa on Thursday, according to MLB.com writer Carrie Muskat.
Soriano, 35, recorded five scoreless outings with Tennessee. He gave up one unearned run on three hits and three walks with four strikeouts over five innings.
The 35-year-old had his best season in 2010 when he recorded 45 saves for the Tampa Bay Rays.
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Cubs manager Joe Maddon said Soriano, who has 637 career strike outs, isn’t expected to join the Cubs until after the All-Star break.
The Cubs currently have the seventh-best bullpen ERA in the MLB, but rank towards the bottom with 21 total saves this season.