Power–speed Number
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Power–speed number or power/speed number (PSN) is a
sabermetrics Sabermetrics (originally SABRmetrics) is the original or blanket term for sports analytics in the US, the empirical analysis of baseball, especially the development of advanced metrics based on baseball statistics that measure in-game activity ...
baseball Baseball is a bat-and-ball games, bat-and-ball sport played between two team sport, teams of nine players each, taking turns batting (baseball), batting and Fielding (baseball), fielding. The game occurs over the course of several Pitch ...
statistic developed by baseball author and analyst
Bill James George William James (born October 5, 1949) is an American baseball writer, historian, and statistician whose work has been widely influential. Since 1977, James has written more than two dozen books about baseball history and statistics. His a ...
which combines a player's
home run In baseball, a home run (abbreviated HR) is scored when the Baseball (ball), ball is hit in such a way that the batting (baseball), batter is able to circle the bases and reach home plate safe (baseball), safely in one play without any error ( ...
and
stolen base In baseball, a stolen base occurs when a runner advances to a base unaided by other actions and the official scorer rules that the advance should be credited to the action of the runner. The umpires determine whether the runner is safe or out ...
numbers into one number. The formula is: : PSN = \frac. (It is the
harmonic mean In mathematics, the harmonic mean is a kind of average, one of the Pythagorean means. It is the most appropriate average for ratios and rate (mathematics), rates such as speeds, and is normally only used for positive arguments. The harmonic mean ...
of the two totals.) Power–speed number is displayed as a number with one digit after the
decimal point FIle:Decimal separators.svg, alt=Four types of separating decimals: a) 1,234.56. b) 1.234,56. c) 1'234,56. d) ١٬٢٣٤٫٥٦., Both a comma and a full stop (or period) are generally accepted decimal separators for international use. The apost ...
. James introduced the power–speed number in his commentary on
Bobby Bonds Bobby Lee Bonds Sr. (March 15, 1946 – August 23, 2003) was an American right fielder in Major League Baseball from to . He played for the San Francisco Giants, New York Yankees, California Angels, Chicago White Sox, Texas Rangers (baseball), ...
, writing "it is so crafted that a player who does well in both home runs and stolen bases will rate high, and his rating is determined by the balance of the two as well as by the total."


Leaders

The highest single-season power–speed number was recorded in 2024 by
Shohei Ohtani is a Japanese professional baseball designated hitter and pitcher for the Los Angeles Dodgers of Major League Baseball (MLB). Nicknamed "Shotime", he has previously played in MLB for the Los Angeles Angels and in Nippon Professional Basebal ...
of the
Los Angeles Dodgers The Los Angeles Dodgers are an American professional baseball team based in Los Angeles. The Dodgers compete in Major League Baseball (MLB) as a member club of the National League (baseball), National League (NL) National League West, West Div ...
, with 54 home runs and 59 stolen bases for a power-speed number of 56.39. It was previously held by
Ronald Acuña Jr. Ronald José Acuña Blanco Jr. (born December 18, 1997) is a Venezuelan professional baseball outfielder for the Atlanta Braves of Major League Baseball (MLB). After signing with the Braves as an international free agent in 2014, Acuña made hi ...
who hit 41 home runs and stole 73 bases in 2023 to record a power–speed number of 52.51. The highest career power–speed number belongs to
Barry Bonds Barry Lamar Bonds (born July 24, 1964) is an American former professional baseball left fielder who played 22 seasons in Major League Baseball (MLB). Bonds was a member of the Pittsburgh Pirates from 1986 to 1992 and the San Francisco Giants f ...
. Bonds had 762 career home runs and 514 career stolen bases for a career power–speed number of 613.9.
Rickey Henderson Rickey Nelson Henley Henderson (December 25, 1958 – December 20, 2024), nicknamed "Man of Steal", was an American professional baseball left fielder who played 25 seasons in Major League Baseball (MLB) for nine teams from 1979 to 2003, inc ...
is second on the career list at 490.4, followed by
Willie Mays Willie Howard Mays Jr. (May 6, 1931 – June 18, 2024), nicknamed "the Say Hey Kid", was an American professional baseball center fielder who played 23 seasons in Major League Baseball (MLB). Widely regarded as one of the greatest players of ...
(447.1),
Alex Rodriguez Alexander Emmanuel Rodriguez (born July 27, 1975), nicknamed "A-Rod", is an American former professional baseball shortstop, third baseman and designated hitter and current businessman. Rodriguez played 22 seasons in Major League Baseball (ML ...
(446.8), Barry's father
Bobby Bonds Bobby Lee Bonds Sr. (March 15, 1946 – August 23, 2003) was an American right fielder in Major League Baseball from to . He played for the San Francisco Giants, New York Yankees, California Angels, Chicago White Sox, Texas Rangers (baseball), ...
(386.0), and
Joe Morgan Joe Leonard Morgan (September 19, 1943 – October 11, 2020) was an American professional baseball second baseman who played 22 seasons in Major League Baseball (MLB) for the Houston Astros, Houston Colt .45s / Astros, Cincinnati Reds, San Fran ...
(385.9). The highest active career power-speed numbers as of 2024 belong to
Mike Trout Michael Nelson Trout (born August 7, 1991) is an American professional baseball outfielder for the Los Angeles Angels of Major League Baseball (MLB). Trout is an 11-time Major League Baseball All-Star Game, All-Star, three-time American League (A ...
(271.65),
Jose Altuve Jose Carlos Altuve (; born May 6, 1990) is a Venezuelan professional baseball second baseman for the Houston Astros of Major League Baseball (MLB). Having played for the Astros since 2011, he is the longest-tenured current member of the team, an ...
(265.20), and
Andrew McCutchen Andrew Stefan McCutchen (born October 10, 1986) is an American professional baseball outfielder and designated hitter for the Pittsburgh Pirates of Major League Baseball (MLB). He has previously played in MLB for the San Francisco Giants, New Y ...
(259.71).


References

{{DEFAULTSORT:Power-speed number Batting statistics Bill James