How are these numbers calculated?

Big Games

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

Week of 11/13100.0*Chance in playoffs100.0*Average seed
Garrett 91.7 Brian 112.8 +19.8
+1.3
Mike 96.8 Craig 78.6 +3.7
+0.2
Eric 92.7 Ken 122 -2.6
-0.1
Logan 81.5 Kyle 100.7 -1.4
-0.1
Jason 79 Kelly 101.4 -1.0
-0.1
Gerard 122.2 Jon 101.9 -0.2
Week of 11/20100.0*Chance in playoffs100.0*Average seed
Brian 88.1 Eric 86.8 +31.2
+1.6
Ken 144.7 Logan 169.6 +5.6
+0.1
Craig 133.5 Jason 77 -4.5
-0.3
Kelly 95.6 Mike 80.9 -3.4
-0.2
Jon 105.7 Kyle 72.1 +3.0
+0.2
Garrett 117.3 Gerard 119.7 -0.1
If winner is:HomeAway
Week of 11/27100.0*Chance in playoffs100.0*Average seed
Brian vs LoganIn-28.2
+1.0-1.0
Kelly vs Jon-9.3+9.3
-0.2+0.2
Jason vs Ken+4.2-4.2
+0.2-0.2
Craig vs Eric-4.2+4.2
-0.5+0.5

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
71-0In75257,713,340
60-143.6%2519252757,713,388
Total:71.8%50221213315,426,728
Games Above .500
Chance Will Make Playoffs