Gasser will start for the Brewers in Sunday's series finale against the Pirates, Sophia Minnaert of Brewers.tv reports.
Gasser will start in place of Jacob Misiorowski, the latter of whom felt lingering fatigue following his last start against the Cardinals on Tuesday. It'll be the ninth major-league start of the season for Gasser, who has a 2-3 record with a 4.15 ERA and 1.18 WHIP across 43.1 innings.