Myriad Orioles Thoughts: Jackson Holliday in Aberdeen; Dean Kremer's win - The Athletic
Jackson Holliday promoted to High-A Aberdeen
Jackson Holliday being promoted to Double-A (source)
Jackson Holliday being promoted to Double-A (source)
Orioles' top prospect Jackson Holliday crushing it in Aberdeen, drove in 6 on Tuesday - CBS Baltimore
Jackson Holliday racks up six RBIs for Aberdeen IronBirds
Orioles top draft pick Jackson Holliday makes professional debut - Camden Chat
Source: Jackson Holliday is being promoted to Triple-A Norfolk - Blog
Jackson Holliday on his promotion to High-A Aberdeen
O's promote Holliday, MLB's top prospect, to Triple-A at 19 - ESPN