Taillon (hamstring) will begin a rehab assignment with Triple-A Iowa on Sunday, Taylor McGregor of Marquee Sports Network reports.
Taillon has missed a little more than three weeks as he works his way back from a left hamstring strain, and he's progressed enough to test himself in a game setting. The right-hander has a chance to rejoin the Cubs rotation for one start before the All-Star break, assuming he comes out of Sunday's outing with no issues and gets his pitch count up to a sufficient level.