Kiermaier was hurt diving headfirst into first base on an infield single for the Rays in the eighth inning Saturday night. He will have an MRI exam Sunday morning.
The two-time Gold Glove winner has missed time in each of the past three seasons due to a variety of physical issues, including right hip, left wrist and right thumb injuries.
The Rays lost Saturday's game 2-1 in 11 innings.
The Associated Press contributed to this report.