Rosscup signed with the Astros as a non-roster invitee Tuesday, Brian McTaggart of MLB.com reports.
The veteran lefty owns a 5.09 ERA in 86.2 career major-league innings, with his 14.0 percent walk rate offsetting a 29.3 percent strikeout rate. He's only thrown three innings at the highest level over the last two seasons, so he's a long shot to play a significant role in 2022.