How are these numbers calculated?

Big Games

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

Week of 11/22100.0*Chance in playoffs100.0*Average seed
Chris 113.8 Brian 95.57 -17.8
-0.7
Gary 71.98 Nick 104.77 -3.3
-0.1
Jonny 92.2 Angelo 91.38 +2.7
+0.1
Dan 105.62 Mike 130.94 +0.7
Luke 81.92 John 57.61 -0.1
Week of 11/29100.0*Chance in playoffs100.0*Average seed
Gary 113.22 Brian 107.49 -24.7
-1.0
Dan 92.9 Nick 86.65 +10.9
+0.1
Ira 78.04 Angelo 152 -10.0
-0.2
Jonny 124.96 Chris 91.8 -5.0
-0.3
Kevin 113.42 John 128.3 -2.2
Luke 58.97 Mike 114.72 +1.3
+0.1
If winner is:HomeAway
Week of 12/6100.0*Chance in playoffs100.0*Average seed
Dan vs Brian-1.2+1.2
Jonny vs Gary-0.1+0.1
Luke vs Nick+0.1-0.1

What If

Chances based on how well the Brian finish out the regular season.   Explain

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
61-0Out36362927,003,878
50-1Out643626,994,754
Total:Out181814321853,998,632
Games Above .500
Chance Will Make Playoffs