The infielder started the 1967 season with the Mets. Making his debut with the club striking out as a pinch-hitter in Philadelphia during New York's 5-1 loss to the Phillies on April 14th. Bart would score a run as a pinch-runner against the same Phillies the next day.
His favorite memory of Shea Stadium? "I has to be the fans." Shirley remembered in 2014. "They loved their Mets, and it showed." Bart got his first of three starts at second base at Shea. After just six games with New York he was offered back to Los Angeles on May 18th. "I didn't want that to be, but going hitless, and the youngster, Bud Harrelson playing well shortened my stay." said Shirley. "I was glad that the Dodgers wanted me back."