A baseball park on the grounds serves as home to the Watertown Rapids of the Perfect Game Collegiate Baseball League. The ballpark has a capacity of 2,500 people and opened in 1938. From 1983 until 1998 it was the home of the Watertown Pirates and later the Watertown Indians of the professional New York–Penn League. In 1999, the New York Penn-League franchise was moved to Staten Island.
The Watertown Red & Black play their home games at the fairgrounds.
The Watertown Municipal Arena is located on the fairgrounds. Since 2012, the arena has been used for a minor professional hockey team now called the Watertown Wolves of the Federal Prospects Hockey League. It was originally called the 1000 Islands Privateers when it moved from Alexandria Bay to Watertown, and it took the 2015–16 season off for arena renovations.
- "1983–1988 Watertown Pirates". www.funwhileitlasted.net. Retrieved 2014-07-14.
- "Staten Island move in 1999". www.frontiernet.net. Retrieved 2008-06-10.
- "Archived copy". Archived from the original on 2016-03-04. Retrieved 2014-06-11.CS1 maint: archived copy as title (link)
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