Batting average against

In baseball statistics, batting average against (denoted by BAA or AVG), also known as opponents' batting average (denoted by OBA),[a] is a statistic that measures a pitcher's ability to prevent hits during official at bats. It can alternatively be described as the league's hitters' combined batting average against the pitcher.

Sandy Koufax had a .179 batting average against in 1965, the best in Major League Baseball for that season.[1]

Definition edit

Batting average against is calculated as:[2]


for which:

For example, if a pitcher faced 125 batters and allowed 25 hits, issued 8 walks, hit 1 batsman, allowed 2 sacrifice hits, allowed 3 sacrifice flies, and had 1 instance of catcher's interference, the pitcher's BAA would be calculated as:


Reference site more simply defines BAA as hits divided by at bats, as "at bats" for a pitcher equates to the above noted denominator (batters faced less walks, hit by pitch, sacrifice hits, sacrifice flies, and catcher's interference):[3][b]


For example, in 2021, Max Scherzer had the best (lowest) batting average against in Major League Baseball among qualified pitchers.[3][c] Scherzer's BAA for the 2021 season was:[3]


See also edit

Notes edit

  1. ^ Not to be confused with on-base average (OBA), more commonly known as on-base percentage (OBP).
  2. ^ See section "Player Batting Against", hover over "BA" column header.
  3. ^ See section "Player Batting Against", sort by column "BA".

References edit

  1. ^ "1965 Major League Batting Against". Retrieved June 4, 2022.
  2. ^ "Classic Fantasy Baseball Glossary - Definitions of Terms". 2001. Archived from the original on 26 August 2007. Retrieved 2007-07-14.
  3. ^ a b c "2021 Major League Baseball Batting Against". Retrieved June 4, 2022.

External links edit