At New York, Bud Harrelson’s 2-run single in the 7th beats Houston and Wade Blasingame, 2 – 1. It is Blasingame’s first loss to the Mets after nine wins.

On May 10, 1971 — At New York, Bud Harrelson’s 2-run single in the 7th beats Houston and Wade Blasingame, 2 – 1. It is Blasingame’s first loss to the Mets after nine wins.

Source:
Baseball Reference May 10