Greinke was placed on the 15-day injured list Wednesday retroactive to Aug. 21 due to right forearm tightness, Lynn Worthy of The Kansas City Star reports.

EDGE Analysis

The veteran exited his last start with forearm cramping but appeared clear of the injury since he was listed as Kansas City's probable starter for Saturday's matchup with the Padres; however, he'll instead require a trip to the injured list. It's unclear who will take Greinke's spot in the rotation, or if he's expected to be sidelined beyond the 15-day minimum.