On Sept. 27 1935, the Chicago Cubs completed a 21-game win streak to complete a comeback of the St. Louis Cardinals for their 100th win of the season, a pennant clincher. Th Chicago Cubs had won seven pennants by 1935. That year, on Sept. 27, they added an eighth to their collection, the second most by a National League franchise to that point, post 1903. The Cubs weren’t always the lovable losers. For the first 60 years of their history, they were often winners. They had won pennants in 1906, 1907, 1908, 1910, 1918, 1929, 1932 and 1935. They would…