Sproat and the Brewers won't face the Pirates on Friday, as the game was postponed due to rain.
The two sides will make up Friday's contest during a doubleheader Saturday, and the Brewers will send Sproat to the mound to start Game 1, per Curt Hogg of the Milwaukee Journal Sentinel. The 25-year-old righty has begun to turn things around as of late, giving up two runs or fewer in four of his last five starts while posting a 2.88 ERA, 0.96 WHIP and 30:8 K:BB across 25 innings in that span.