Manager Dave Roberts announced White as the starter for Wednesday's game against the Cardinals, Fabian Ardaya of The Athletic reports.
White was previously expected to follow an opener Tuesday, but Roberts instead made a "last-minute decision" to employ a bullpen game instead. The 26-year-old will work as a traditional starter in the series finale. He has a 3.49 ERA, 1.29 WHIP and 41:17 K:BB over 38.2 major-league innings this season.