Abbot was recalled from Triple-A Iowa on Wednesday, Andy Martinez of Marquee Sports Network reports.
The right-hander will rejoin the big-league club after spending the past couple weeks in the minors. He's worked out of the bullpen for the Cubs this season with four runs allowed over 8.1 frames in four appearances, but he's operated as a starter at Triple-A. Abbott and Trevor Williams should be in the mix for a spot start Sunday with Jake Arrieta (hamstring) landing on the injured list.