High Quality Content by WIKIPEDIA articles! The 1945 Chicago Cubs season was a season in American baseball. The team won the National League pennant with a record of 98-56, 3 games ahead of the second-place St. Louis Cardinals. The team went on to the 1945 World Series, which they lost to the Detroit Tigers in seven games. As of the 2011 season, this stands as the last time the Cubs played in the World Series.