With a twelve-run lead, Louisville Colonels right-handed pitcher Icebox Chamberlain holds the Kansas City Cowboys scoreless pitching left-handed for the last two innings.

On May 9, 1888 — With a twelve-run lead, Louisville Colonels right-handed pitcher Icebox Chamberlain holds the Kansas City Cowboys scoreless pitching left-handed for the last two innings.

Source:
Baseball Reference May 9