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*Chance in playoffs100.0*Average seed
Chelsea 62 Jordan 99 -10.0
-0.6
Nathan 92 Stephen 107 -7.3
-0.1
Tom 56 Tom O 69 -0.9
Matt 73 Keith 57 +0.2
+0.1
Dan 60 Justin 60 *-0.1
-0.0
Week of 11/26100.0*Chance in playoffs100.0*Average seed
Tom O 123 Chelsea 74 -16.2
-0.6
Stephen 124 Tom 89 -9.1
-0.1
Keith 60 Jordan 63 +2.7
+0.2
Justin 47 Matt 10 +0.2
+0.1
Nathan 73 Dan 80 -0.2
-0.1
Week of 12/3100.0*Chance in playoffs100.0*Average seed
Stephen 81 Chelsea 76 Out
-0.9

* A starred number could be exactly 0 or just really small. The simulation did not run long enough to know.

Games Above .500
Chance Will Make Playoffs