McCullers (forearm) is scheduled to make his next rehab start Tuesday with Triple-A Sugar Land, Danielle Lerner of the Houston Chronicle reports.
McCullers threw 52 pitches over three innings during his last rehab outing, and he'll continue building up his workload Tuesday. The 28-year-old is expected to make another rehab appearance the following Sunday if all goes well, which could be his final outing before being inserted into Houston's rotation.