Grimm was called back up from Triple-A Iowa on Thursday, Mark Gonzales of the Chicago Tribune reports.

EDGE Analysis

Grimm was promoted to replace Pedro Strop, who is injured with a torn meniscus. He was recently optioned to Iowa on August 9 after rejoining the Cubs a week prior. Throughout the year, Grimm has posted a 4.58 ERA with a 1.36 WHIP during 35.1 innings of work in the majors.