On April 13, 1926 – – More than 45,000 fans at the Polo Grounds watch Jess Petty of the Brooklyn Robins post an Opening Day, 3 – 0, one-hitter over the New York Giants. The Giants will win seven in a row after the opener, only to be beaten again by Petty, 2 – 1, on April 24th.

Source:
Baseball Reference April 13