Portland Blue Sox

The Portland Blue Sox were a minor league baseball team that played out of Portland, Maine. The Blue Sox played in the Maine State League during the 1907 and 1908 seasons. A second Blue Sox team was revived briefly in 1919 and played in the New England League.

In the Maine State League, the Blue Sox were joined in the league by fellow Portlandites, the Pine Tree Capers. In the 1908 season, the Blue Sox led the league with a 32-20 record before the league folded. Both Portland teams played at Back Cove Park in Portland. Like many early minor league teams, the Blue Sox existed for only a short time before folding. Despite their short tenure, they are part of the early fabric of Maine's baseball history.