How are these numbers calculated?

Big Games

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

Week of 4/15100.0*Average seed
Mammoth 5 Rush 11 -0.5
Rush 11 Mammoth 8 -0.5
Rock 12 Bandits 9 +0.2
Bandits 14 Rock 8 -0.1
Swarm 16 Black Wolves 9 +0.1
Week of 4/23100.0*Average seed
Mammoth 10 Rock 5 +0.3
Knighthawks 13 Bandits 15 -0.2
Black Wolves 21 Swarm 11 -0.1
Week of 4/29100.0*Average seed
Bandits 12 Black Wolves 7 -0.5
Mammoth 11 Stealth 10 +0.3
Games Above .500
Chance Will Make Playoffs