The A’s move into first place to stay with a 12 – 5 win over the Indians at Cleveland. Philadelphia scores nine runs in the last two innings to give the win to Lefty Grove.

On May 16, 1931 — The A’s move into first place to stay with a 12 – 5 win over the Indians at Cleveland. Philadelphia scores nine runs in the last two innings to give the win to Lefty Grove.

Source:
Baseball Reference May 16