The field was reconstructed in the late 1970s to play host to the CCBL's Hyannis Mets franchise, which joined the league in 1976.

[7] Ospreys have routinely nested atop the light stanchions since at least 1992, and their gametime activity has come to be seen as symbolic of the unique flavor of baseball on Cape Cod.

[16] In response, the Hyannis club opted to drop its "Mets" moniker prior to the 2010 season, and became the Harbor Hawks.

[17] In 2011, the Harbor Hawks dedicated the field house at McKeon Park in honor of Massachusetts state senator Jack Aylmer, who had been instrumental in the franchise's 1976 founding.

The ballpark has been the summertime home of dozens of future major leaguers such as Robin Ventura, Jackie Bradley Jr., and Jason Varitek.