Kennedy is expected to be activated from the 10-day disabled list after sustaining a right hamstring strain on May 4. The right-hander is 4-2 with a 3.74 ERA in nine career starts against the Twins.
Mejia will rejoin the Twins after posting a 3.48 ERA in four starts at Triple-A Rochester. The lefty was scheduled to start on short rest on Saturday, but he was pushed back to Game 2 on Sunday after a rainout.
After Saturday's postponement, Kansas City and Minnesota will close out a three-game set with a traditional doubleheader on Sunday, starting at 1:10 p.