The Baseball Gauge Glossary

mW (Marginal Wins)

Number of wins better than a .414 (67 wins in 162 games) winning percentage

W = Wins
G = Games

mW = (W - ((67/162) * G)) / 10

bPts (Bonus Points)

Awarded for Championships and Postseason success

.1 points for winning the Wild Card
.15 points for winning the Division
.5 points for winning the League Championship
.25 points for winning the World Series

Teams with multiple managers throughout the season

Wild Card, Division, & League Championship (before 1969) bonus points are prorated based on marginal wins (mW).
League Championship (1969-Pres) and World Series bonus points are given to the manager that managed in the postseason.

mPts (Manager Points)

Marginal Wins plus Bonus Points

Example

W = 103
G = 162
Team won Wild Card, League, and World Series

mPts = (103 - (67/162) * 162) / 10 + .1 + .5 + .25 = 4.5