Secondary average, or SecA, is a baseball statistic

Baseball statistics

Statistics play an important role in summarizing baseball performance and evaluating players in the sport.Since the flow of a baseball game has natural breaks to it, and normally players act individually rather than performing in clusters, the sport lends itself to easy record-keeping and statistics...

 - more precisely, a sabermetric

Sabermetrics

Sabermetrics is the specialized analysis of baseball through objective, empirical evidence, specifically baseball statistics that measure in-game activity. The term is derived from the acronym SABR, which stands for the Society for American Baseball Research...

 measurement of hitting performance. It is a complement to batting average

Batting average

Batting average is a statistic in both cricket and baseball that measures the performance of cricket batsmen and baseball hitters. The two statistics are related in that baseball averages are directly descended from the concept of cricket averages.- Cricket :...

, which is a simple ratio of base hits to at bats. Secondary average is a ratio of bases gained from other sources (extra base hit

Extra base hit

In baseball, an extra base hit , also known as a long hit, is any base hit on which the batter is able to advance past first base without the benefit of a fielder either committing an error or opting to make a throw to retire another base runner...

s, walks

Base on balls

A base on balls is credited to a batter and against a pitcher in baseball statistics when a batter receives four pitches that the umpire calls balls. It is better known as a walk. The base on balls is defined in Section 2.00 of baseball's Official Rules, and further detail is given in 6.08...

 and net bases gained through stolen base

Stolen base

In baseball, a stolen base occurs when a baserunner successfully advances to the next base while the pitcher is delivering the ball to home plate...

s) to at bats. Secondary averages have a higher variance

Variance

In probability theory and statistics, the variance is a measure of how far a set of numbers is spread out. It is one of several descriptors of a probability distribution, describing how far the numbers lie from the mean . In particular, the variance is one of the moments of a distribution...

 than batting averages.

In modern Major League Baseball

Major League Baseball

Major League Baseball is the highest level of professional baseball in the United States and Canada, consisting of teams that play in the National League and the American League...

, a secondary average higher than about .500 is considered outstanding, and one below .200 is considered very poor. The league average SecA is typically similar to the league average batting average, in the range of .250-280.

The formula is

where

• TB = Total bases
  Total bases
  In baseball statistics, total bases refers to the number of bases a player has gained with hits, i.e., the sum of his hits weighted by 1 for a single, 2 for a double, 3 for a triple and 4 for a home run.Only bases attained from hits count toward this total....
  
  
• H = Hits
• BB = bases on balls
• SB = Stolen base
  Stolen base
  In baseball, a stolen base occurs when a baserunner successfully advances to the next base while the pitcher is delivering the ball to home plate...
  
  s
• CS = Caught stealing
  Caught stealing
  In baseball, a runner is charged, and the fielders involved are credited, with a time caught stealing when the runner attempts to advance or lead off from one base to another without the ball being batted and then is tagged out by a fielder while making the attempt...
  
  
• AB = At bats