This park, with a playground, basketball courts, and playing field, was dedicated to the memory of the late Hamilton politician and priest, Father Sean O'Sullivan. Father Sean was educated at a Hamilton high school as well as Brock University. At 20, Father Sean became Canada's youngest MP and was even made special assistant to Prime Minister Diefenbaker. In 1977, after representing the riding of Hamilton-Wentworth for 5 years as a member of the Conservative Party, Father Sean left a promising political career to become a priest. He studied at the Irish College Seminary at the Vatican, and was ordained in 1981. Unfortunately, Father Sean was found to have leukemia two years later, which proved to be the cause of his death in 1989 when he was 37 years old.
Residents of the Gershome neighbourhood were pleased to choose the name of Father Sean for their park because of their admiration for such a wonderful person. Speaking to the crowd at the park's opening, Duke O'Sullivan said that his brother would have been pleased to lend his name to the park, having grown up in East Hamilton.
It was these same Gershome residents who also formed a neighbourhood committee to clean up the park, which was previously in an undeveloped state.