The Astros optioned VanWey to Triple-A Sugar Land on Tuesday, Julia Morales of Space City Home Network reports.
Houston selected VanWey's contract Friday, and he'll return to Triple-A after firing two scoreless frames in two appearances. The right-hander has struggled in 15 relief outings for Sugar Land this year with a 5.74 ERA, 1.58 WHIP and 19:6 K:BB over 15.2 innings.