How are these numbers calculated?

Big Games

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

Week of 8/12100.0*Chance in playoffs100.0*Average seed
Diamondbacks 173 Giants 138.5 -13.0
-1.3
Rockies 232.5 Dodgers 265.5 +2.7
+0.1
Nationals 401 Mets 277.5 +0.1
Phillies 302 Braves 202 +0.1
Reds 261.5 Cubs 224.5 +0.1
Week of 8/19100.0*Chance in playoffs100.0*Average seed
Rockies 126 Giants 64.5 Out
-1.2
Diamondbacks 137 Dodgers 86 -6.1
-0.1
Phillies 137.5 Mets 174 -0.2
Nationals 96 Braves 128 -0.2
Brewers 96.5 Cubs 92.5 +0.1
If winner is:HomeTieAway
Week of 8/26100.0*Chance in playoffs100.0*Average seed
Dodgers vs Giants-0.5-0.5+0.5

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-L-Tplayoffs123456789101112Count
91-0-0Out1002,674,680
8-8.5Out1002,782,440*
Total:Out49515,457,120

* Row combines multiple less frequent records.

Games Above .500
Chance Will Make Playoffs

Lottery

We are out of the playoffs. Here are the big games and what ifs for draft seeds.
Although it might be more fun to go down swinging.

Big Games

Week of 8/12100.0*Lottery seed
Diamondbacks 173 Giants 138.5 +1.6
Astros 138 Rangers 277.5 +0.1
Nationals 401 Mets 277.5 -0.1
Phillies 302 Braves 202 -0.1
Blue Jays 279 Rays 329.5 +0.1
Yankees 290 Red Sox 367 -0.1
Rockies 232.5 Dodgers 265.5 -0.1
Week of 8/19100.0*Lottery seed
Rockies 126 Giants 64.5 +1.6
Diamondbacks 137 Dodgers 86 +0.3
Nationals 96 Braves 128 +0.2
Phillies 137.5 Mets 174 +0.2
Rays 113.5 Red Sox 151.5 -0.2
Yankees 131.5 Blue Jays 112.5 +0.1
Angels 125.5 Rangers 78 -0.1
If winner is:HomeTieAway
Week of 8/26100.0*Lottery seed
Dodgers vs Giants+0.5+0.5-0.5
Yankees vs Rays+0.0-0.5+0.0

What If

100100100100100100100100100100100100100100100100100100100100100100100100
If finish:Chance will finish season at seed
TWW-L-T123456789101112131415161718192021222324
91-0-05149
8.50-0-115049
80-1-015049
Total:255025