Difference between revisions of "Onbase percentage"
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−  '''  +  '''Onbase percentage''' (abbreviated '''OBP''') is a [[baseball]] [[statistic]] designed to track the rate at which a hitter reaches base as a result of his own actions (as opposed to, for example, defensive lapses). Another way to interpret OBP is the percentage of a player's plate appearances that he does not make an out. 
+  
+  The formula for onbase percentage is  
+  
+  <math>OBP = \frac{H+BB+HBP}{AB+BB+HBP+SF}</math>  
+  
+  where  
+  
+  *''H'' is Hits  
+  *''BB'' is Walks  
+  *''HBP'' is times hit by a pitch  
+  *''AB'' is At bats  
+  *''SF'' is Sacrifice Flies  
+  
+  Because there is a high correlation between OBP and runs scored, the use of onbase percentage in player evaluation has gained favor among baseball enthusiasts and front offices in recent years. It has proven to be a more reliable indicator of a player's offensive performance than [[batting average]].  
+  
+  ==See Also==  
+  *[[Slugging percentage]]  
+  *[[Onbase plus slugging]]  
+  *[[Sabermetrics]]  
+  
+  [[Category:Baseball]]  
+  {{baseball}} 
Revision as of 20:50, 31 May 2009
Onbase percentage (abbreviated OBP) is a baseball statistic designed to track the rate at which a hitter reaches base as a result of his own actions (as opposed to, for example, defensive lapses). Another way to interpret OBP is the percentage of a player's plate appearances that he does not make an out.
The formula for onbase percentage is
where
 H is Hits
 BB is Walks
 HBP is times hit by a pitch
 AB is At bats
 SF is Sacrifice Flies
Because there is a high correlation between OBP and runs scored, the use of onbase percentage in player evaluation has gained favor among baseball enthusiasts and front offices in recent years. It has proven to be a more reliable indicator of a player's offensive performance than batting average.
See Also
Baseball Terms  

