The team moved to Breadon Field, a new ballpark just north of the city in Whitehall Township, on August 6, 1948 after playing on the road until then due to construction delays.

The renovation effort was led by Earl F. Hunsicker who raised an estimated $1,400,000 over an 11-year period, aided by Mayor Joseph S. Daddona and the Allentown Recreation Commission.

Dwindling attendance, hurt by increasingly poor on-field performance, led owner Peter Karoly to fold the Allentown Red Sox shortly before the 2004 season; the franchise wound up as a travel team for a year as the Northeast League Aces prior to becoming the Worcester Tornadoes in 2005.

Over its six seasons, 21 Major League Baseball players played for or managed the Ambassadors, including Ed Ott, Luis Andujar, Kim Batiste, Scott Bullett, Brian Drahman, Angelo Encarnacion, Mike Figga, Jason McDonald, Darryl Motley, and Brad Pennington.

[10][11] In February, 2024, it was announced that Muhlenberg College had reached an agreement with the City of Allentown to lease and renovate ECTB Stadium for their baseball games.