Home runs per nine innings

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In baseball statistics, home runs allowed per 9 innings pitched (HR/9IP or HR/9) or home runs allowed per nine innings (denoted by HR/9) is the average number of home runs given up by a pitcher per nine innings pitched. It is determined by multiplying the number of home runs allowed by nine and dividing by the number of innings pitched. [1] Pitchers with high fly ball rates are more likely than pitchers with high ground ball rates to have high HR/9 rates. [1]

Baseball statistics play an important role in evaluating the progress of a player or team.

Pitcher the player responsible for throwing ("pitching") the ball to the batters in a game of baseball or softball

In baseball, the pitcher is the player who throws the baseball from the pitcher's mound toward the catcher to begin each play, with the goal of retiring a batter, who attempts to either make contact with the pitched ball or draw a walk. In the numbering system used to record defensive plays, the pitcher is assigned the number 1. The pitcher is often considered the most important player on the defensive side of the game, and as such is situated at the right end of the defensive spectrum. There are many different types of pitchers, such as the starting pitcher, relief pitcher, middle reliever, lefty specialist, setup man, and the closer.

In baseball, innings pitched (IP) are the number of innings a pitcher has completed, measured by the number of batters and baserunners that are put out while the pitcher is on the pitching mound in a game. Three outs made is equal to one inning pitched. One out counts as one-third of an inning, and two outs counts as two-thirds of an inning. Sometimes, the statistic is written 34.1, 72.2, or 91.0, for example, to represent ​34 1⁄3 innings, ​72 2⁄3 innings, and 91 innings exactly, respectively.

Leaders

The career leaders in HR/9IP through 2018 were Jim Devlin (0.0448), Al Spalding (0.0468), and Reb Russell (0.0488). [2]

Jim Devlin American baseball player

James Alexander Devlin was an American Major League Baseball player who played mainly as a first baseman early in his career, then as a pitcher in the latter part. He played for three teams during his five-year career; the Philadelphia White Stockings and the Chicago White Stockings of the National Association, and the Louisville Grays of the National League. However, after admitting to throwing games and costing the Grays the pennant in the 1877 Louisville Grays scandal, he and three of his teammates were banished permanently from Major League Baseball.

Reb Russell American baseball player

Ewell Albert "Reb" Russell was a Major League Baseball player for the Chicago White Sox and the Pittsburgh Pirates.

There were 87 single-season leaders in HR/9IP through 2018 who had pitched a season without giving up a home run. [3] All played prior to 1927. [3]

The active leaders in HR/9IP through 2018 were Clayton Kershaw (0.6225), Adam Wainwright (0.6755), and Charlie Morton (0.7682). [4]

Clayton Kershaw American baseball player

Clayton Edward Kershaw is an American professional baseball pitcher for the Los Angeles Dodgers of Major League Baseball (MLB). A left-handed starting pitcher, Kershaw has played in the major leagues since 2008, and his career earned run average (ERA) and walks and hits per innings pitched average (WHIP) are the lowest among starters in the live-ball era with a minimum of 1,000 innings pitched. Kershaw has a career hits allowed per nine innings pitched average of 6.61—the second-lowest in MLB history—along with three Cy Young Awards and the 2014 National League Most Valuable Player Award. He has been described throughout the majority of his career as the best pitcher in baseball.

Adam Wainwright baseball player

Adam Parrish Wainwright is an American professional baseball pitcher for the St. Louis Cardinals of Major League Baseball (MLB). The Atlanta Braves selected him 29th overall in the first round of the 2000 amateur draft from Glynn Academy in Brunswick, Georgia. His performance in the minor leagues brought him notice as one of the Braves' top pitching prospects. The Braves traded him to the Cardinals after the 2003 season, receiving outfielder J. D. Drew in a deal which has since been considered lopsided in favor of the Cardinals. Wainwright made his MLB debut on September 11, 2005, against the New York Mets.

Charlie Morton (pitcher) Major League Baseball pitcher

Charles Alfred Morton IV is an American professional baseball pitcher for the Tampa Bay Rays of Major League Baseball (MLB). He previously played for the Atlanta Braves, Pittsburgh Pirates, Philadelphia Phillies, and Houston Astros. Morton was an All-Star in 2018.

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References

  1. 1 2 What is a Home Runs Per Nine Innings (HR/9)? | Glossary | MLB.com
  2. ↑ Career Leaders &amp Records for Home Runs per 9 IP | Baseball-Reference.com
  3. 1 2 Single-Season Leaders &amp Records for Home Runs per 9 IP | Baseball-Reference.com
  4. ↑ Active Leaders &amp Records for Home Runs per 9 IP | Baseball-Reference.com
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