Kevin Kiermaier will be in uniform on Saturday to take Jennings' place.
Meanwhile, the Rays are taking a wait-and-see approach with catcher Ryan Hanigan, who left Friday's game prior to the bottom of the eighth with a right hamstring problem that arose when he grounded out to end the seventh.
Hanigan told reporters that he received treatment for the issue, which he felt was caused by either cramping or a mild strain.
Rays manager Joe Maddon noted that if Hanigan is not available, Sean Rodriguez will be the emergency catcher and after Rodriguez, the duty would fall to Wil Myers. The Rays outfielder once played catcher in the Royals' farm system.
Bill Chastain is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.