Kimbrel exited Sunday's game against the Padres in the top of the ninth inning due to an apparent back injury, Fabian Ardaya of The Athletic reports.
Kimbrel was hit by a comebacker with one out in the top of the ninth inning and initially remained in the game, but he was ultimately removed by a trainer after he gave up a double and a single to the next two batters. The extent of his injury isn't yet clear, and whether he's forced to miss time remains to be seen.