1. He was born Cornelius Alexander McGillicuddy in Massachusetts in 1862. His more well know name is a shortening of both his first and last names.
2. He was a Major League catcher between 1886 and 1896, playing he entire career in the National League, except for a stint in the 1890 Player’s League. He hit all of .245 with five home runs.
3. He was player manager at Pittsburgh between 1894 and 1896 inclusive. After retiring he managed Milwaukee in the Western League between 1897 and 1899 inclusive.
4. In 1901 he was made manager of the Philadelphia team (called the Athletics after a previous team) in the newly formed American League. Almost immediately he moved to gain at least partial ownership of the team. He took 25% ownership in 1901 with sporting goods mogul Ben Shibe taking 50% and a pair of local sports writers owning the other 25%. In 1913 he bought out the two writers and became co-owner with Shibe. He handled baseball operations and Shibe the business side of the team. In 1937 he became majority owner of the A’s.
5. He was known as an excellent judge of talent and for judicious use of his catchers despite a limited roster.
6. His Athletics won the second American League pennant in 1902, then participated in the second World Series in 1905 (there was no Series in 1902). They lost in five games to the New York Giants.
7. During the years 1910 through 1914 the A’s won pennants in 1910, 1911, 1913, and 1914. They won the World Series in the first three of those seasons.
8. Due to financial considerations Mack lost most of his quality players in 1915, had a disastrous 1916 (36-117 record), then began rebuilding.
9. Between 1929 and 1931 the A’s won three more pennants and the World Series in both 1929 and 1930. That made Mack the only manager to win back-to-back World Series’ twice. Both Casey Stengel (5 in a row) and Joe McCarthy (4 in a row) won at least three in a row later.
10. Again in financial trouble, he sold off his best players and never recovered. After 1933 his team never finished in the first division again. The team also suffered because Mack failed to create a “farm” system until late and did a poor job in signing quality Negro League players once the Major Leagues integrated beginning in 1947.
11. By 1950 he was in failing health and although still manager, was having his coaches make most of the on field decisions.
12. He retired after the 1950 season with 3731 wins, 3948 losses (both records), nine pennants, and five World Championships (not counting his 1902 championship–a year without a World Series). He died in 1956.
13. He was elected to the Hall of Fame in 1937.