Defeating the Orioles 1 – 0, the Yankees improve their record to 61-20, equaling the best 81-game start in major league history. The mark matches the record of the 1902 Pittsburgh Pirates and the 1907 Chicago Cubs.

This Day In Baseball

On July 5, 1998 Defeating the Orioles 1 – 0, the Yankees improve their record to 61-20, equaling the best 81-game start in major league history. The mark matches the record of the 1902 Pittsburgh Pirates and the 1907 Chicago Cubs.

Source
Baseball Reference July 5