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Astros Baseball Basics

Baseball Basics: Stats 101

How to calculate various baseball statistics.

Batting Average (AVG)
Divide the number of base hits by the total number of at bats.
Earned Run Average (ERA)
Multiply the total number of earned runs by nine, and divide the results by the total innings pitched.
W-L Percentage
Divide the number of games won by the total number of decisions.
Slugging Percentage (SLG)
Divide the total number of bases of all base hits by the total number of times at bat.
On-Base Percentage (OBP)
Divide the total number of hits plus Bases on Balls plus hits by Pitch BY at Bats plus Bases on Balls plus hit by Pitch plus Sacrifice Flies.
Fielding Average
Divide the total number of putouts and assists by the total number of putouts, assists and errors.