An MRI showed no structural damage , manager Chip Hale said .
The swelling in Greinke 's shoulder will have to subside before he can ramp up his throwing again , leaving him without enough time before the end of the season .
An MRI showed no structural damage , manager Chip Hale said , but the swelling in Greinke 's shoulder will have to subside before he can ramp up his throwing again , leaving him without enough time before the end of the season .