The Astros announced they have designated left-handed pitcher Joe Thatcher for assignment, ahead of Vince Velasquez's start on Tuesday.
#Astros recall RHP Vince Velasquez from AA Corpus Christi to make tonight's start. #Astros designate LHP Joe Thatcher for assignment.
— Houston Astros (@astros) July 21, 2015
The move was coming after manager A.J. Hinch announced Velasquez would rejoining the Astros rotation following the All-Star break. Thatcher was a non-roster invitee to the Spring Training this season after spending 2014 with the Angels.