The Astros designated Weiss for assignment Friday.
The Astros gave Weiss a major-league contract over the offseason after he spent time overseas, but he was sent down to Triple-A Sugar Land in early May after posting a 7.62 ERA, 2.12 WHIP and 30:20 K:BB over 26 innings. Given his $2.6 million salary, he will likely clear waivers and remain at Sugar Land.