Cornelius Alexander Mack (December 22, 1862 – February 8, 1956), born Cornelius Alexander McGillicuddy, was an American professional baseball player, manager, and team owner. Considered one of the greatest managers in Major League Baseball history, he holds records for wins (3,731), losses (3,948), and games managed (7,755), with his victory total being almost 1,000 more than any other manager. He managed the Philadelphia Athletics for the club's first 50 seasons of play before retiring at age 87 following the 1950 season. He was the first manager to win the World Series three times, and is the only manager to win consecutive Series on separate occasions (1910-11, 1929-30); his five Series titles remain the third most by any manager, and his nine American League pennants rank second in league history. However, constant financial struggles forced repeated rebuilding of the roster, and Mack's teams also finished in last place 17 times.