CINCINNATI — Ken Griffey Jr. hit his 599th career homer today, leaving him one shy of a seldom-reached mark, and Jay Bruce extended his amazing weeklong debut with a 10th-inning homer for an 8-7 victory over the Atlanta Braves.

Bruce's first big league homer off Manny Acosta (3-2) dealt another crushing road defeat to the Braves, who couldn't hold a one-run lead heading into the ninth.

Griffey was on deck when Bruce connected for the game-winning solo shot. The 21-year-old rookie rounded the bases, flipped his helmet into the air halfway to home, then got pummeled by teammates when he hopped on the plate. The Reds' top prospect is 11-for-19 in his first five games in the majors.