Sproat was removed from Wednesday's game against the Guardians due to right hamstring cramps, Adam McCalvy of MLB.com reports.
Sproat pitched three perfect innings Wednesday before giving up a grand slam in the fourth and was noticeably wincing on the mound a few batters later. It's unclear whether the injury puts him at risk of missing his next start -- tentatively scheduled to come next week in Cincinnati -- but the Brewers could provide more details after the game.