At that time, the Eastern League was officially Class A, but, prior to the minor-league classification realignment that took place in 1963, that level was almost equivalent to Double-A.
From 1939 through 1952, Allentown had hosted a Class B Interstate League franchise, the Cardinals—also the Dukes, FleetWings and Wings—and for much of that period, it was an affiliate of the namesake St. Louis Cardinals.
Former Allentown player Tracy Stallard is remembered as the pitcher who served up Roger Maris' 61st home run in 1961 while playing for Boston.
On September 3, 1960, the Red Sox kept its Eastern League playoff hopes alive with a 7-6, 3-2 sweep of Williamsport at Hess Stadium, the second of four straight doubleheaders the A-Sox played to close out the season.
[1] Over subsequent seasons, the club has remained in the Eastern League under different names in various cities: The Red Sox parted company with the franchise in 1995, signing a player development contract with the Trenton Thunder.