Yawkey devoted his time and finances for the rest of his life to attempting to build winning teams, with "The Boston Globe" citing Yawkey's estimation in 1974 that he lost $10 million on the team during his tenure owning the Red Sox. His teams' best seasons took place in 1946, 1967, and 1975, when the Red Sox captured the American League pennant but then went on to lose each World Series in seven games, against the St. Louis Cardinals (1946, 1967) and the Cincinnati Reds (1975). He would never achieve his ultimate goal of winning a world championship.