Boston Legacy fans have thrown their support behind the team, one of the NWSL's two expansion teams this season. The Boston Independent Supporters' Association (ISA) has been instrumental in building a culture of advocacy and belonging for the team and its fans. More than two years of work had led to this moment for the ISA, with members marching into Gillette Stadium for the Legacy's opening match on 14 March 2026. They followed behind the marching band from Boston Public Schools and held their "Up the Swans" scarves over their heads.
The ISA's commitment to inclusivity is evident in their decision to fly the Pride flag and the trans flag at every game, and their involvement in the "Trans People Belong" coalition. This commitment to creating a welcoming environment for all fans is a key part of the ISA's mission, and it has helped to build a strong sense of community among fans. The Legacy's players have also been vocal about the impact of the ISA's support, with goalkeeper Casey Murphy saying that the fans' energy is a key factor in the team's success.
The Legacy's aggressive style of play, which has seen them lead the NWSL in yellow cards this season, is also a reflection of the fans' enthusiasm and dedication. That cheering, that energy and that support is something the Boston ISA has brought to every Legacy home game this season – rain or shine, win or lose, small crowd or large, Massachusetts or Rhode Island.