What Does BB Mean in Baseball?

San Francisco Giants' Barry Bonds smile as he walks up to bat against the San Diego Padres in the sixth inning of a baseball game.
(AP Photo/Marcio Jose Sanchez)
  • BB means base on balls in baseball.
  • K/BB is a metric to evaluate pitchers.
  • A higher K/BB is better for a pitcher.

Learning all the different notations used on baseball box scores can take some time. “BB” is one of the common acronyms fans see, whether looking at last night’s results or browsing a Baseball Reference page.

What Does BB Mean in Baseball?

BB stands for “base on balls.” This happens when a pitcher throws four pitches outside the strike zone that the hitter does not swing at. 

The hitter is awarded a walk to first base. A walk is marked in the scorebook as “BB.”

What Does K/BB Mean in Baseball?

K/BB is a ratio of how often a pitcher strikes out hitters compared to how often he allows walks. It is a useful metric to evaluate a pitcher.

This is calculated by dividing the number of strikeouts by the number of walks. A higher number is better for a pitcher, as it means they strike out considerably more batters than they walk. 

K/BB can be a useful statistic to look at when considering player props in baseball betting markets at the BetMGM sportsbook.

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