The Orioles are making roster moves as they face the Miami Marlins, giving Chayce McDermott his MLB debut, while Connor Norby may replace injured Jorge Mateo. McDermott will be the 10th pitcher to start for the Orioles this season, aiming to provide rest for Burnes and Rodriguez. The team is relying on prospects like McDermott and Norby to bolster their season after a recent slump.