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 +12.3
Eric Froehlich 0 Rich Shay 1 +7.7
Chris Pikula 0 Luis Scott-Vargas 1 +1.7
Steve Menendian 0 Bob Maher 1 +0.6
Randy Buehler 0 Josh Utter-Leyton 1 +0.1
If winner is:HomeAway
Week of 10/21100.0*Chance in playoffs100.0*Average seed
Tom Martell vs Josh Utter-Leyton+13.2-34.3
Eric Froehlich vs David Williams-5.6+8.9
Chris Pikula vs Bob Maher-3.8+9.9
Rich Shay vs Luis Scott-Vargas-3.5+0.7
Randy Buehler vs Steve Menendian+1.3-0.3

What If

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

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