Orioles promote 2022 No. 1 draft pick Jackson Holliday to High-A Aberdeen after he hit .392 at Delmarva April 25, 2023 by The Baltimore Sun In 13 games this year with the Orioles’ Low-A affiliate, 19-year-old shortstop Jackson Holliday hit .392 with a .523 on-base percentage and .667 slugging percentage, walking 14 times against 12 strikeouts.