The Phillies’ Grover Cleveland Alexander records his first shutout, stopping Brooklyn, 5 – 0, on three hits. Alex fans nine to run his record to 3-1.

On May 8, 1911 — The Phillies’ Grover Cleveland Alexander records his first shutout, stopping Brooklyn, 5 – 0, on three hits. Alex fans nine to run his record to 3-1.

Source:
Baseball Reference May 8