Zimmermann to start opening day for Tigers
The Tigers announced the decision on Sunday. They begin the season on Thursday at Toronto.
Zimmermann has struggled during his three years with the Tigers after arriving as a free agent before the 2016 season.
He battled neck issues in 2016 before going 8-13 with a 6.08 ERA in 29 starts in 2017.
Last year, the 32-year-old Zimmerman was 7-8 with a 4.52 ERA over 25 starts and had core muscles repair surgery in October.