ST. LOUIS -- The Cubs activated left-hander Shota Imanaga from the 15-day injured list to start Thursday's series finale at St. Louis.
To make room on the roster, Chicago designated right-hander Michael Fulmer for assignment.
The 31-year-old Imanaga (3-2, 2.82 ERA) had been shelved since early May with a strained left hamstring. In his final rehab outing, Imanaga threw 72 pitches in 4 1/3 scoreless innings for Triple-A Iowa on Friday.
Imanaga has made eight starts this season, allowing two or fewer runs in six of them.