In baseball statistics, home runs allowed per nine 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.What is a Home Runs Per Nine Innings (HR/9)? | Glossary | MLB.com Pitchers with high fly ball rates are more likely than pitchers with high ground ball rates to have high HR/9 rates.
Career leaders Key Rank Rank amongst leaders in career earned run average. A blank field indicates a tie. Player Name of player. HR/9 Total career home runs per nine innings pitched Innings pitched Total career innings pitched HR allowed Total career home runs allowed Teams played for Teams the player appeared with throughout their career* Denotes elected to National Baseball Hall of Fame.
All-time leaders Must have a minimum of 2,000 career innings pitched to qualify RankPlayerHR/9Innings pitchedHR allowedTeams played for1*0.046815Boston Red Stockings,Chicago White Stockings2*0.050212Baltimore Canaries,Cincinnati Reds,Hartford Dark Blues,New York Mutuals,Philadelphia Whites3*0.069823Chicago White Sox,Boston Braves40.070317Brooklyn Eckfords,Chicago White Stockings,Philadelphia Athletics,Philadelphia Whites,Troy Haymakers5*0.07352,32719Cleveland Blues/Napoleons/Naps6*0.084142Philadelphia Athletics,St. Louis Browns,St. Louis Terriers70.08652,08220Boston Red Stockings,Philadelphia Athletics80.08933,22632Boston Red Sox,Chicago White Sox,Detroit Tigers90.09102,27523Brooklyn Tip-Tops,Cleveland Naps,Newark Peppers/Indianapolis Hoosiers,Philadelphia Athletics,Pittsburgh Pirates,Washington Nationals100.091130Brooklyn Superbas,Detroit Tigers,New York Yankees,Washington Senators
Active leaders Must have a minimum of 1,000 career innings pitched to qualify Updated through April 24, 2026 RankPlayerHR/9Innings pitchedHR allowedTeams played for (current team in bold)10.622276San Francisco Giants20.713188Detroit Tigers,Houston Astros30.73581,12191Atlanta Braves,New York Yankees40.86261,565150New York Mets,Texas Rangers50.86271,158111Los Angeles Dodgers,San Diego Padres,San Francisco Giants,Tampa Bay Rays60.8644166New York Mets,Philadelphia Phillies70.90421,941195Boston Red Sox,Cincinnati Reds,Minnesota Twins,New York Yankees,Oakland Athletics,St. Louis Cardinals80.92852,113218Atlanta Braves,Boston Red Sox,Chicago White Sox90.9375372Detroit Tigers,Houston Astros,New York Mets,San Francisco Giants100.9456222Chicago Cubs,Chicago White Sox,Colorado Rockies,Los Angeles Angels,Milwaukee Brewers,New York Mets,Pittsburgh Pirates,San Francisco Giants,St. Louis Cardinals
Negro Major Leagues Must have a minimum of 600 career innings pitched in the Negro Major Leagues to qualify. Only Negro Major League statistics are included in this table RankPlayerHR/9Innings pitchedHR allowed10.072362*0.10581530.1222114*0.12419431350.1308146*0.13201,5002270.13762280.13981290.142420100.144312
Annual leaders National League
Must have 1.0 innings pitched per team game to qualify YearLeaderHR/9HR allowedInnings pitchedTeamRunner-upHR/9HR allowedInnings pitched , 0.0000 0 216 (Cummings),282 (Knight) Hartford Dark Blues (Cummings),Philadelphia Athletics (Knight) 0.0343 1 ,, 0.0000 0 (Blong), (Matthews),100 (Mitchell) St. Louis Brown Stockings (Blong),Cincinnati Reds (Matthews and Mitchell) 0.0359 2 501 , 0.0000 0 117 (McCormick),98 (Nichols) Indianapolis Blues (McCormick),Providence Grays (Nichols) 0.0192 1 468 ,, 0.0000 0 (Hankinson),120 (McGunnigle),89 (Salisbury) Chicago White Stockings (Hankinson),Buffalo Bisons (McGunnigle),Troy Trojans (Salisbury) 0.0455 3 593 0.0000 0 105 Troy Trojans 0.0183 1 493 0.0000 0 Boston Red Caps 0.0277 1 0.0643 3 420 Boston Red Caps 0.0957 4 376 0.0263 1 342 Cleveland Blues 0.0638 1 141 0.1222 2 Detroit Wolverines 0.1611 7 391 0.0000 0 St. Louis Maroons 0.0491 2 0.1272 5 St. Louis Maroons 0.1397 6 0.1821 7 346 New York Giants 0.1849 3 146 0.0852 3 317 Boston Beaneaters 0.0981 3 0.2118 4 170 Pittsburgh Alleghenys 0.2225 9 364 0.0492 3 New York Giants 0.0730 3 370 0.0668 2 New York Giants 0.0786 3 0.0256 1 Louisville Colonels 0.1007 2 0.0859 1 Pittsburgh Pirates 0.0994 2 181 0.0865 2 208 Chicago Colts 0.1324 3 204 0.0000 0 Pittsburgh Pirates 0.0824 2 0.0291 1 309 Baltimore Orioles 0.0476 2 378 0.0575 2 309 Baltimore Orioles 0.0634 1 142 0.0000 0 258 Pittsburgh Pirates 0.0276 1 0.0333 1 Philadelphia Phillies 0.0347 1 259 0.0774 2 Pittsburgh Pirates 0.1154 3 234 0.0256 1 356 Brooklyn Superbas 0.0357 1 ,, 0.0000 0 (Doheny),231 (Tannehill), (Malarkey) Pittsburgh Pirates (Doheny & Tannehill),Boston Nationals (Malarkey) 0.0302 1 0.0302 1 Pittsburgh Pirates 0.0466 1 193 0.0268 1 Boston Nationals 0.0293 1 307 , 0.0000 0 279 (Phillippe), (Stricklett) Pittsburgh Pirates (Phillippe),Brooklyn Superbas (Stricklett) 0.0309 1 ,, 0.0000 0 (Karger), (Weimer),322 (Willis) Pittsburgh Pirates / St. Louis Cardinals (Karger),Cincinnati Reds (Weimer),Pittsburgh Pirates (Willis) 0.0265 1 ,, 0.0000 0 (Karger), (Weimer),322 (Willis) Pittsburgh Pirates / St. Louis Cardinals (Karger),Cincinnati Reds (Weimer),Pittsburgh Pirates (Willis) 0.0265 1 ,, 0.0000 0 180 (Camnitz),274 (Corridon),207 (Lundgren) Pittsburgh Pirates (Camnitz),Philadelphia Phillies (Corridon),Chicago Cubs (Lundgren) 0.0315 1 286 0.0000 0 Philadelphia Phillies 0.0250 1 ,, 0.0000 0 171 (Corridon),260 (Gaspar), (Rowan) Philadelphia Phillies (Corridon),Cincinnati Reds (Gaspar & Rowan) 0.0263 1 0.0346 1 260 Pittsburgh Pirates 0.0381 1 236 0.0000 0 205 New York Giants 0.0441 1 204
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