There is a class and pitching difference here that makes this a worthy investment to back the Braves. 
Dallas Keuchel is a "B" level pitcher, who has been throwing like his past Cy Young days. The lefty is 4-0 with a 0.87 ERA during his last five starts spanning 31 innings. 
The Phillies are 16-22 against lefty starters and going with Zach Eflin, who is a bottom of the rotation type starter at best. Eflin has really struggled against Atlanta this year surrendering 12 earned runs in 5 2/3 innings. 
Philadelphia can't beat a good team when Elfin starts. The Phillies are 2-12 the past 14 times Elfin has faced an above .500 opponent. 
Atlanta has been one of the hottest teams in baseball winning 18 of its last 22 games and seven of its past nine.