Seaton gained fame for her hard tackling and strong presence on the pitch, playing for several teams, including Castle Rovers, a team she helped form. She also played for Rutherglen Ladies during their groundbreaking tour of Britain and Ireland, becoming their top goal scorer. Her standout performance included scoring seven goals in a single match in Dublin in front of 12,000 spectators.

Seaton's fame extended beyond football; she had her own agent, Josie Farrell, who helped her secure public appearances and even advertisements. Despite facing criticism for her "masculine" appearance, she remained a beloved figure in Belfast, where she was frequently seen in the local pubs of Sailortown. After her football career, she continued to support women's football through refereeing and organising matches.

Molly Seaton passed away in 1974, but her contributions to women's football were rediscovered in recent years, cementing her legacy as one of the game's early trailblazers in Ireland