Mejia will start Saturday against the Rays, LaVelle Neal of the Minneapolis Star Tribune reports.
Mejia has rejoined the team and will be added back onto the active roster ahead of Saturday's matchup opposite Jake Odorizzi. The 23-year-old Mejia mostly struggled in his first three starts, but he rebounded last weekend, holding Kansas City to three runs over seven innings en route to his first career win. He could get an extended look in the absence of Phil Hughes (shoulder), but Mejia will need to at least hold his own to maintain a rotation spot.