If the sale and move go through, Boston will be part of a wave of new WNBA cities. The league announced Portland, Toronto, Cleveland, Detroit and Philadelphia as expansion cities in an upcoming wave of growth, which will unfold over the next five years.

Boston Celtics minority owner Steve Pagliuca offered to acquire the Connecticut Sun and move the team to Boston in a deal that values the team at a record $325 million, according to people familiar with the agreement.