"It's a fresh start," said Fick, who joined the team prior to Friday's game. "It really is. The Cardinals, it's tough to break in and tough to stay. I had served my time there. It was time to go."
Astros general manager Jeff Luhnow, who drafted Fick while working for the Cardinals, called him and told him he was headed to Houston.
"He said 'You're an Astro now and pack your things,'" he said. "'You're going to Houston.'"
Fick, 26, made two appearances for the Cardinals this season in May, posting no record and a 5.40 ERA. He's spent the majority of this season with Triple-A Memphis, going 1-1 with one save and a 4.68 ERA in 42 relief appearances. The Cardinals designated him for assignment on Wednesday.