Mushinski was recalled from Triple-A Sugar Land on Saturday, Chandler Rome of the Houston Chronicle reports.
Mushinski spent nearly a month in Sugar Land, and he struck out 12 in 10.1 scoreless innings over nine appearances during his stint with the minor-league club. He's posted a 5.06 ERA and 1.13 WHIP in 5.1 innings over five relief appearances with the Astros this year and will rejoin the big-league bullpen after Blake Taylor (elbow) was placed on the 15-day injured list Saturday.