The Pirates beat Chicago, 8 – 1, as Deacon Phillippe tops Jock Menefee. It is the 8th game in nine days between the two teams, half in Pittsburgh and the last four in Chicago.

On May 9, 1901 — The Pirates beat Chicago, 8 – 1, as Deacon Phillippe tops Jock Menefee. It is the 8th game in nine days between the two teams, half in Pittsburgh and the last four in Chicago.

Source:
Baseball Reference May 9