SAN DIEGO -- Luis Perdomo's 2018 season might be on its last legs.
The 25-year-old right-hander was placed on the disabled list Saturday after he sustained a strain in his throwing shoulder during a 6-2 loss to the D-backs on Friday night. The club did not offer a timetable for his return.
The Padres recalled lefty reliever Jose Castillo in his place. They'll need to make another move for a starter when Perdomo's spot in the rotation comes up again -- likely next Thursday in Chicago.