The Reds, at the height of their Big Red Machine dynasty, recorded a franchise-high 108 victories in 1975 and won the NL West division by 20 games over the Los Angeles Dodgers, then defeated the Pittsburgh Pirates, three games to none, in the NL Championship Series. The Red Sox won the AL East division by games over the Baltimore Orioles, then defeated the three-time defending World Series champion Oakland Athletics, three games to none, in the AL Championship Series. The sixth game of the World Series was a 12-inning classic at Boston's Fenway Park, which culminated with a walk-off home run by Carlton Fisk to extend the series to seven games. The Reds won the seventh and deciding game of the series on a ninth-inning single by Joe Morgan.