Sandlin will serve as the Guardians' opening pitcher for Sunday's game against the Astros, Mandy Bell of MLB.com reports.
Sandlin will make his second start of the regular season Sunday, with Gavin Williams expected to serve in bulk relief. Sandlin's first start came Aug. 26 against the Royals, when he allowed two walks while striking out two batters in one scoreless inning. Sandlin has a 3.75 ERA, 1.27 WHIP and 68:27 K:BB across 57.2 innings this season.