How are these numbers calculated?

Big Games

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

Week of 10/14100.0*Chance in playoffs100.0*Average seed
Tom Martell 1 David Williams 0 -14.4
Eric Froehlich 0 Rich Shay 1 +8.5
Chris Pikula 0 Luis Scott-Vargas 1 +1.5
Steve Menendian 0 Bob Maher 1 +0.2
Randy Buehler 0 Josh Utter-Leyton 1 +0.1
If winner is:HomeAway
Week of 10/21100.0*Chance in playoffs100.0*Average seed
Eric Froehlich vs David Williams-10.2+16.3
Tom Martell vs Josh Utter-Leyton-2.6+6.6
Chris Pikula vs Bob Maher-1.5+3.9
Rich Shay vs Luis Scott-Vargas-2.1+0.4
Randy Buehler vs Steve Menendian+0.7-0.2

What If

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

If finish:Chance inChance will finish regular season at seed
Games Above .500
Chance Will Make Playoffs