| Haymarket Senators | ||
| Founded | December 2005 | |
| Field | Battlefield High School | |
| Team History | Haymarket Senators (2006-2012) (moved) Aldie Senators (2013–2015) | |
| Division | Northern | |
| Championships | 1 (2009) | |
| Owner | 2005 - 2007: Mark Keagle2007 - 2012: Bernie Schaffler, Scott Newell, Robin Schaffler, Jayme Newell | |
The team's uniform colors are navy blue and red.The Haymarket Senators originally joined the Valley Baseball League in the winter of 2005 when Mark Keagle purchased the Haymarket Battlecats and promptly renamed the team. Due to a lack of support by the local community the Senators were sold at the conclusion of 2007 season. The Haymarket Senators moved to the neighboring community of Aldie after the completion of the 2012 season.
On August 12, 2009, the Senators won their first Valley League Baseball Championship, beating the Covington Lumberjacks 6-1.
On July 7, 2009, Scott Krieger, a player from George Mason University who played for the Senators in 2008, was selected by the Milwaukee Brewers in the 19th round of the MLB Draft.