ATLANTA (AP) - Jason Heyward, Justin Upton and Dan Uggla homered in the eighth inning, and Juan Francisco hit a pair of solo shots earlier in the game to help the Atlanta Braves win their 10th straight with a 6-3 victory over the Kansas City Royals on Tuesday night.

Atlanta's 10-game winning streak is its longest since the club won 15 straight from April 15-May 2, 2000. The Braves are 12-1 and off to their best start since they began the 1994 season 13-1.

Eric O'Flaherty (3-0) allowed one hit and struck out two in a scoreless eighth for the win in relief.

Heyward's second homer, Upton's eighth and Uggla's third were solo shots off Kelvin Herrera (1-1), who gave up three hits, four runs and one walk in two-thirds of an inning. The Braves have outhomered opponents 25-7 and outscored opponents 68-25 for the best run differential in the majors.