Current and former Buffalo Bisons (minor league) managers. The Bisons have played in the following minor leagues: International Association (1878; 1886–1890); Eastern League of 1884–1911 (1892–1898; 1901–1911); 19th century Western League (1899) and its successor, the American League (1900, the year before the AL claimed Major League status); International League (1912–1970; 1998–2020; 2022–present); the modern Eastern League (1979–1984); the American Association (1985–1997), and Triple-A East (2021).