 The true end of the multipurpose era began in 1987, when Buffalo's Pilot Field, a stadium built for the Buffalo Bisons minor league baseball team and a potential MLB expansion franchise, opened.Pilot Field replaced the long-obsolete War Memorial Stadium, which had been designed mainly for football, but had been (awkwardly) fit for baseball after the city's baseball park, Offermann Stadium, was torn down in 1960.During the 1990s and 2000s, most of the multipurpose stadiums used for MLB in the United States were replaced (most of those replaced have been demolished) by "retro- style" ballparks.