The Fielders were owned by Grand Slam Sports & Entertainment, LLC, based in Deerfield.

Actor Kevin Costner, whose filmography includes baseball films Bull Durham (1988), Field of Dreams (1989), and For Love of the Game (1999), also had ownership interest in the team.

[1] The Fielders began play in 2010 at Carthage College because of funding problems with Zion Ballpark.

Lights were added to the field, and the Fielders played their first night game on Monday, July, 26.

After the conclusion of the 2010 season, the temporary ballpark was completely dismantled and construction on a new, permanent stadium was supposed to begin.