The Frederick Keys are a Minor League Baseball (MiLB) team located in Frederick, Maryland. They are the High-A affiliate of the Baltimore Orioles and play in the South Atlantic League. Home games are played at Nymeo Field at Harry Grove Stadium. Prior to Major League Baseball's reorganization of the minor leagues following the 2020 season, the Keys served as the Class A-Advanced affiliate of the Orioles from 1989 to 2020. After the reorganization, the Keys joined the MLB Draft League. On August 1, 2025, the team announced that it would once again serve as the Class A-Advanced affiliate of the Baltimore Orioles starting in 2026, replacing the Aberdeen IronBirds, who replaced the Keys in the Draft League.