The Orioles will make a decision this weekend whether to put Castro in the rotation or ship him back to Triple-A Norfolk to develop as a starter, Peter Schmuck of The Baltimore Sun reports.
The 22-year-old has been impressive through 22 games as a reliever for the O's this year, managing a 2.73 ERA over 33 innings. However, Castro has spent recent minor-league seasons being groomed as a starter, and after allowing just one hit over six innings Friday, the right-hander showed he may be ready for a rotation job. Sending Castro back to the bullpen only hurts his development, so that option seems to be off the table. If he does get a crack at a starting job, Chris Tillman is likely to become a reliever in the meantime.