The team's name was a derivative of the nearby Boston Red Sox of the American League and a tribute to the boxers Rocky Marciano and Marvelous Marvin Hagler, both from Brockton.
In January 2025, it was announced that the collegiate team was folding while the professional New England Knockouts would be renamed as the Brockton Rox.
On May 23, 2005, the club gave a roster spot to former Boston Red Sox pitcher and colorful personality Oil Can Boyd.
He set an early tone for a successful 2006 campaign with a game-winning solo home run in the 10th inning on Opening Night at Campanelli Stadium.
Before the 2009 season, the Rox hired Chris Carminucci, former Atlantic City Surf President and Director of Baseball Operations, as field manager.
However, with Carminucci Sports Group (CSG) taking control as the club's new managing partner, the Rox were stabilized and had a successful 2010 season, competing for a spot in the playoffs.
[7] During the 2024 season, the Rox shared their home ballpark with the New England Knockouts, a professional team competing in the Frontier League.
On January 29, 2025, it was announced that the Knockouts franchise had been acquired by former Greenville Drive and Salem Red Sox owner, Bill Janetscheck.
With the change in ownership, the team announced a re-brand to the Brockton Rox, marking the demise of the FCBL franchise.
The primary logo formerly consisted of the "Rox" wordmark in red with navy blue outline, with a pair of boxing gloves (an allusion to two boxers from Brockton: Rocky Marciano and Marvelous Marvin Hagler).