In Washington, the Senators top the A’s and Lefty Grove, 4 – 0. Grove had come into the game having allowed just one earned run in his previous 48 innings.

On May 10, 1936 — In Washington, the Senators top the A’s and Lefty Grove, 4 – 0. Grove had come into the game having allowed just one earned run in his previous 48 innings.

Source:
Baseball Reference May 10