The Braves lose a doubleheader to the Pirates, 3 – 0 and 2 – 1, to run their loss streak to 16. Jim Rooker is the winner in game 1, with Larry Demery the victor in game 2.

On May 10, 1977 — The Braves lose a doubleheader to the Pirates, 3 – 0 and 2 – 1, to run their loss streak to 16. Jim Rooker is the winner in game 1, with Larry Demery the victor in game 2.

Source:
Baseball Reference May 10