Tolliver was claimed off waivers by the Astros on Monday, Jake Kaplan of the Houston Chronicle reports.
This marks the second time Tolliver has been plucked off waivers since September, as two teams now have deemed him unworthy of a 40-man roster spot. The left-hander's numbers in the minor leagues were solid -- he struck out 42 batters and only allowed 11 runs across 40.1 innings split between Double-A and Triple-A last season -- but his lack of control will likely keep him out of high-leverage innings.