Montz, called up from the minors after Coco Crisp and Chris Young were injured in Tuesday's 19-inning win against the Los Angeles Angels, homered leading off the fourth.
Andy Pettitte had his second straight shaky outing for New York, allowing Luke Montz's solo home in the fourth his first in 4 1-2 years and Yoenis Cespedes' two-run homer in the fifth.