Manager Craig Counsell revealed on "The Parkins & Spiegal Show" that the Cubs had called up Thompson from Triple-A Iowa on Friday, per 670 The Score.
With Jose Cuas being sent down Thursday, the Cubs are bringing in Thompson to shore up their bullpen depth. Thompson has not allowed a run in his last three outings with Iowa, striking out six batters while allowing one hit and two walks in five innings over that span.