The HWB league first folded after the 1997 season as it was too heavily reliant on its limited funding from MLB.
In 2006 the league returned for its sixth season. It was the only winter league to feature both top Japanese and American talent. However, this new league folded following the 2008 season when the contract with MLB had expired. MLB is now looking to establish a league in Arizona that would not challenge the competing Arizona Fall League.