On July 9, 2000 The Yankees lose to Mike Hampton and the Mets, 2 – 0. Armando Benitez closes for the Mets, while Andy Pettitte is the loser. The Yanks also lose Shane Spencer, who blows out his knee and ends his season. The game at Shea Stadium draws 54,283, the largest regular season crowd for the Mets since 1970.

Source:

Baseball Reference July 9