Astros general manager Jeff Luhnow said Tuesday that Anthony Bass (intercostal) will go out on a rehab assignment "soon." Bass threw a simulated game Monday in his latest progression from an intercostal strain. "Bass is going to go out on a rehab assignment soon," Luhnow said. "It will be the first of the guys to come back. Hopefully that will go well so we can get him back before the end of the month."