 Just as pitchers and catchers were set to report for Spring training , Siebert was dealt to the Padres for a minor league pitcher.Siebert began the 1977 season with the triple A Hawaii Islanders, and was up in the majors for less than two weeks when he was part of the infamous "Saturday Night Massacre" in New York.On June 15, 1977, the Mets traded Dave Kingman to the San Diego Padres for Siebert and Bobby Valentine, sent Tom Seaver to the Cincinnati Reds for Pat Zachry, Doug Flynn, Steve Henderson and Dan Norman, and Mike Phillips to the St. Louis Cardinals for Joel Youngblood.