This is a list of seasons completed by the Detroit Tigers. They played in the Western League from their inception in 1894 to the 1900 season; in 1900, the league changed its named to the American League and became a major league in 1901. The Tigers have completed 122 seasons in Major League Baseball, qualifying for the postseason sixteen times and reaching the World Series eleven times (1907-1909, 1934, 1935, 1940, 1945, 1968, 1984, 2006, 2012) with four world championships (1935, 1945, 1968, 1984).