1901 – Giants fractious owner Andrew Freedman accuses umpire Billy Nash of incompetence and bars him from the Polo Grounds. The Pirates’ Chief Zimmer and the Giants’ John Warner are forced to officiate. Christy Mathewson then wins his 7th straight, 2 – 1, but his scoreless streak stops at 39 innings when the Bucs score an unearned run in the 9th.

This Day In Baseball

On May 21, 1901 — 1901 – Giants fractious owner Andrew Freedman accuses umpire Billy Nash of incompetence and bars him from the Polo Grounds. The Pirates’ Chief Zimmer and the Giants’ John Warner are forced to officiate. Christy Mathewson then wins his 7th straight, 2 – 1, but his scoreless streak stops at 39 innings when the Bucs score an unearned run in the 9th.

Source:
Baseball Reference May 21