Home runs per nine innings

HR/9IP = 9 \cdot \frac{HR}{IP}

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.

Baseball statistics

Batting	Batting average On-base percentage Slugging percentage Hit – Single Double Triple Home run Grand slam RBI Game-winning RBI Walk Bunt Sacrifice bunt Sacrifice fly On-base plus slugging

Baserunning	Run Stolen base Stolen base percentage Caught stealing

Pitching	Win–loss record Innings pitched Pitchers of record Save Hold Run Earned ERA Strikeout Walk Perfect game No-hitter WHIP Quality start Complete game Shutout Wild pitch Passed ball

Fielding	Fielding percentage Assist Putout Error Fielder's choice Defensive indifference

Sabermetrics	Base runs Batting park factor Catcher's ERA Defensive Runs Saved Extrapolated Runs Game score Isolated Power Range factor Runs created Secondary average NERD Out of zone plays made Ultimate zone rating Weighted on-base average Wins above replacement Win probability added Win shares

Team stats	Sports league ranking