Castano will be recalled to start Saturday's game against the Brewers, Christina De Nicola of MLB.com reports.
Castano has made three starts this season. His 4.73 ERA could be worse -- his 5.63 FIP and 5.68 xFIP indicate that it should have been worse. He's allowed far too much contact, striking out just 8.6 percent of opposing batters. A corresponding move has not yet been announced.