Rod Carew had a .408 BABIP in 1977, one of the best single-season BABIPs since 1945.[1]

In baseball statistics, batting average on balls in play (abbreviated BABIP) is a measurement of how often batted balls result in hits, excluding home runs.[2] It can be expressed as, "when you hit the ball and it’s not a home run, what’s your batting average?"[1] The statistic is typically used to evaluate individual batters and individual pitchers.

Calculation

BABIP is computed per the following equation, where H is hits, HR is home runs, AB is at bats, K is strikeouts, and SF is sacrifice flies.[2]

Effect

As compared to batting average, which is simply hits divided by at bats, BABIP excludes home runs and strikeouts from consideration while treating sacrifice flies as hitless at bats.

In Major League Baseball (MLB), .300 is considered an average BABIP.[2] Various factors can impact BABIP, such as a player's home ballpark;[3] for batters, being speedy enough to reach base on infield hits;[3] or, for pitchers, the quality of their team's defense.[4]

Usage

BABIP is commonly used as a red flag in sabermetric analysis, as a consistently high or low BABIP is hard to maintain—much more so for pitchers than hitters. Therefore, BABIP can be used to spot outlying seasons by pitchers. As with other statistical measures, those pitchers whose BABIPs are extremely high (bad) can often be expected to improve in the following season, and those pitchers whose BABIPs are extremely low (good) can often be expected to worsen in the following season.

While a pitcher's BABIP may vary from season to season, there are distinct differences between pitchers when looking at career BABIP figures.

See also

References

  1. 1 2 Reinhart, Brian (June 4, 2013). "The Ten Highest BABIPs since 1945". FanGraphs. Retrieved October 9, 2022.
  2. 1 2 3 Slowinski, Piper (February 10, 2010). "BABIP". FanGraphs. Retrieved October 9, 2022.
  3. 1 2 Ryan, Shane (May 17, 2012). "The Luckiest Season Ever and the Quest for a .400 BABIP". Grantland. Retrieved October 9, 2022.
  4. ↑ Eriq (May 18, 2010). "The True Nature of 'Luck' For Pitchers". fantasyballjunkie.com. Archived from the original on 2011-07-10. Retrieved 2010-05-30 – via Wayback Machine.
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