How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 11/19100.0*Average seed
Nathan 92 Stephen 107 -0.6
Matt 73 Keith 57 -0.1
Tom 56 Tom O 69 -0.1
Dan 60 Justin 60 +0.0
Week of 11/26100.0*Average seed
Nathan 73 Dan 80 -0.3
Justin 47 Matt 10 -0.1
Stephen 124 Tom 89 +0.1
Tom O 123 Chelsea 74 -0.1
Week of 12/3None
Games Above .500
Chance Will Make Playoffs