Solomon was recalled from Triple-A Sugar Land prior to Friday's game against Oakland, Danielle Lerner of the Houston Chronicle reports.
Solomon was optioned to Houston's taxi squad Monday after earning the win while logging four innings Sunday against the Diamondbacks. Zack Greinke's move to the injured list with a neck issue opens up a spot for the right-hander to return to the Astros' bullpen for the series opener in Oakland, and he figures to be an option to provide length behind spot starter Brandon Bielak.
