Both pitchers kept the game scoreless until the top of the fourth inning, when Dan Uggla crushed a sinker from Arroyo deep into the left field seats for a solo home run. That gave the Braves an early 1-0 lead.
Hanson didn't struggle until the sixth, when back-to-back singles from Cozart and Heisey put runners on first and second with one out for Brandon Phillips. Phillips worked a walk to load the bases for Jay Bruce.
Bruce followed with a grounder to first baseman Freddie Freeman, who threw to second for the first out. Tyler Pastornicky's throw back to first to attempt to complete the double play was late, allowing Cozart to score and tie the game.
Hanson left after the sixth, finishing with a line of 6 IP, 4 H, 1 R, 1 ER, 2 BB, 5 K.
Arroyo worked into the seventh, leaving with Pastornicky on second after a one-out double. Jose Arredondo then entered and walked pinch-hitter Chipper Jones, but then Brandon Phillips made a great play after bobbling a ball at second to escape the jam.
Chad Durbin entered in a tie game in the seventh, which isn't the role Durbin should be used in. It didn't harm Atlanta though.
Dusty Baker elected to use his closer in the ninth, and Aroldis Chapman recorded two strikeouts and a groundout in a scoreless top of the inning.
In the bottom of the ninth, Fredi Gonzalez didn't use his closer, electing to use Martinez instead. After striking out the first batter, Frazier popped a home run to right to end the game at 2-1. The ball went an estimated 355 feet.