Jennings (bruised knee) has no timetable for a return, Roger Moooney of the Tampa Tribune reports. Jennings is still experiencing pain when he runs, an obvious concern for a player whose skill set is predicated on speed. Rather than trot out Jennings in the lineup at diminished strength, the Rays will give the outfielder as much time as he needs to get back to 100 percent health, though there's no telling how long that might take. Until Jennings reports improvement, Kevin Kiermaier will man center field on a near-everyday basis.