According to SABR, he was one of the most consequential men in major league baseball history:
Mack retired in 1950. The A's moved to Kansas City in 1954 and then Oakland in 1968.Connie Mack’s Hall of Fame career spanned 65 major-league seasons as a player, manager, team executive, and owner. He posted 3,731 wins, a mark that exceeds any other manager’s total by more than 1,000 victories. He guided the Athletics to nine American League championships and won five World Series titles in eight appearances. He was the first manager to win three World Series titles, and the first to win consecutive titles two times. The valleys were as low as the peaks were high - he also endured a major-league record 3,948 losses, and his team finished last in its league 17 times. He built his dynasties with rising young players, won championships with the stars he developed, and then sold off those stars when he could no longer afford them.
Mack died in 1956 and spent 66 years in baseball.
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