How are these numbers calculated?

Big Games

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

Week of 9/15100.0*Chance in playoffs100.0*Average seed
Padres 2 Tornadoes 3 In
+2.9
Losers 0 Chills 5 -0.5
-0.0
Plecks 2 Grizzlys 4 +0.3
Points
Chance Will Make Playoffs