U.S. President Harry Truman throws out two balls at the Washington Senators opener – one left-handed and the other right-handed – then watches the Senators beat the Philadelphia Athletics, 8 – 7. When rain starts falling in the 6th inning, he puts on a raincoat and remains to the end.

This Day In Baseball

On April 18, 1950 — U.S. President Harry Truman throws out two balls at the Washington Senators opener – one left-handed and the other right-handed – then watches the Senators beat the Philadelphia Athletics, 8 – 7. When rain starts falling in the 6th inning, he puts on a raincoat and remains to the end.

Source
Baseball Reference April 18