On April 17, 1939 – – On the morning of Opening Day in Washington, DC, U.S. President Franklin D. Roosevelt and the New York Yankees visit Abner Doubleday’s grave at Arlington National Cemetery. Roosevelt is also scheduled to throw out the first pitch at Griffith Stadium, but the game is rained out and Vice President John Nance Garner will do the honors four days later.

 

Source 

Baseball Reference April 17