How are these numbers calculated?

Big Games

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

Friday100.0*Average seed
NYH 5 DET 6 +0.3
BOS 6 SAN 3 -0.2
Sunday100.0*Average seed
DET 2 POR 4 -0.4
BOS 2 SUF 4 +0.3
Games Above .500
Chance Will Make Playoffs