Portland Breakers ended in 1985.
Portland Breakers was created in 1983.
That was the Portland Breakers. The team started in Boston in 1983, moved to New Orleans in 1984, and then to Portland in 1985.
Newcastle Breakers ended in 2000.
Portland LumberJax ended in 2009.
Portland University ended in 1900.
Portland Speedway ended in 2001.
Portland Fire ended in 2002.
Portland Indians ended in 1948.
Portland Branch Railway ended in 1965.
Portland Grand Prix ended in 2006.
Grand Prix of Portland ended in 2007.
Allentown Portland Cement Company ended in 1960.