Atlanta Braves Playoff Chances 2013-3 50/50

Beat Phillies 12-5, average seed down 0.2 to 2
96-66   .593

How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Friday100.0*Average seed
Atlanta 1 Phillies 0 +0.2
St. Louis 7 Cubs 0 -0.2
Saturday100.0*Average seed
St. Louis 6 Cubs 2 -0.2
Atlanta 4 Phillies 5 -0.2
Sunday100.0*Average seed
Atlanta 12 Phillies 5 +0.2
St. Louis 4 Cubs 0 -0.2
Games Above .500
Chance Will Make Playoffs