On December 20, 1940 — Connie Mack announces he has acquired the controlling interest in the A’s, a team he has managed for the past 40 years, for a reported $42,000. The Philadelphia skipper, who will celebrate his 78th birthday in three days, had shared the ownership with the heirs of Benjamin Shibe, who started the franchise on a joint basis in 1901.

Sources:
National Pastime

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