The Spire City Ghost Hounds are a professional baseball team in Frederick, Maryland, that played in 2023. The franchise competed in the South Division of the Atlantic League of Professional Baseball and played home games at Nymeo Field at Harry Grove Stadium, sharing the ballpark with the Frederick Keys. Following the 2023 season, the team went on hiatus for the 2024 season.

Nymeo Field at Harry Grove Stadium, located in Frederick, Maryland, is the home of the Frederick Keys, a collegiate summer baseball team of the MLB Draft League. Opened in 1990, it seats 5,400 fans.