Boston rookie Frank Sullivan makes his first start and beats the Yankees at Yankee Stadium, 6 – 3. Sullivan strikes out Mickey Mantle three times before Mickey clocks one over the auxiliary scoreboard into the right-centerfield bleachers.

On May 21, 1954 — Boston rookie Frank Sullivan makes his first start and beats the Yankees at Yankee Stadium, 6 – 3. Sullivan strikes out Mickey Mantle three times before Mickey clocks one over the auxiliary scoreboard into the right-centerfield bleachers.

Source:
Baseball Reference May 21