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'''Power–speed number''' or '''power/speed number''' ('''PSN''') is a [[sabermetrics]] [[baseball]] statistic developed by baseball author and analyst [[Bill James]] which combines a player's [[home run]] and [[stolen base]] numbers into one number.<ref name="chesscafe1">http://www.chesscafe.com/text/heisman23.pdf</ref> | |||
The formula is: | |||
:<math> PSN = \frac{2*HR*SB}{HR + SB}</math>.<ref name="chesscafe1"/> | |||
(It is the [[harmonic mean]] of the two totals.) | |||
Power–speed number is displayed as a number with one digit after the [[decimal point]]. | |||
James introduced the power–speed number in his commentary on [[Bobby Bonds]], 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."<ref>{{cite web|last=Lederer |first=Rich |url=http://baseballanalysts.com/archives/2004/07/abstracts_from_15.php |title=Abstracts From The Abstracts |publisher=The Baseball Analysts |date=July 26, 2004 |accessdate=January 24, 2013}}</ref> | |||
[[File:Ryan Braun at bat in August 2008.jpg|thumb|180px|[[Ryan Braun]]]] | |||
The highest single season power–speed number was turned in 1998 by [[Alex Rodriguez]], then of the [[Seattle Mariners]]. Rodriguez hit 42 home runs and stole 46 bases to record a power–speed number of 43.9.<ref>{{cite web|url=http://www.baseball-reference.com/leaders/power_speed_number_leagues.shtml |title=Yearly League Leaders & Records for Power-Speed # |publisher=Baseball-Reference.com |date= |accessdate=January 24, 2013}}</ref> | |||
The highest career power–speed number belongs to [[Barry Bonds]]. Bonds had 762 career home runs and 514 career stolen bases for a career power–speed number of 613.9. [[Rickey Henderson]] is second on the career list at 490.4, followed by [[Willie Mays]] (447.1), [[Alex Rodriguez]] (410.6), Barry's father [[Bobby Bonds]] (386.0), and [[Joe Morgan]] (385.9).<ref>{{cite web|url=http://www.baseball-reference.com/leaders/power_speed_number_progress.shtml |title=Progressive Leaders & Records for Power-Speed # |publisher=Baseball-Reference.com |date= |accessdate=January 24, 2013}}</ref><ref>{{cite web|url=http://research.sabr.org/brj/index.php/thunder-and-lightning |title=Thunder and Lightning |publisher=Research.sabr.org |date= |accessdate=January 24, 2013}}</ref> | |||
The 2012 leaders were [[Ryan Braun]] in the National League (34.6),<ref>{{cite web|url=http://www.baseball-reference.com/leagues/NL/2012-batting-leaders.shtml |title=2012 National League Batting Leaders |publisher=Baseball-Reference.com |date= |accessdate=January 24, 2013}}</ref> and [[Mike Trout]] in the American League (37.2).<ref>{{cite web|url=http://www.baseball-reference.com/leagues/AL/2012-batting-leaders.shtml |title=2012 American League Batting Leaders |publisher=Baseball-Reference.com |date= |accessdate=January 24, 2013}}</ref> | |||
==References== | |||
{{Reflist}} | |||
{{DEFAULTSORT:Power-speed number}} | |||
[[Category:Batting statistics]] | |||
Revision as of 19:36, 17 September 2013
Power–speed number or power/speed number (PSN) is a sabermetrics baseball statistic developed by baseball author and analyst Bill James which combines a player's home run and stolen base numbers into one number.[1]
The formula is:
- .[1]
(It is the harmonic mean of the two totals.)
Power–speed number is displayed as a number with one digit after the decimal point.
James introduced the power–speed number in his commentary on Bobby Bonds, 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."[2]
The highest single season power–speed number was turned in 1998 by Alex Rodriguez, then of the Seattle Mariners. Rodriguez hit 42 home runs and stole 46 bases to record a power–speed number of 43.9.[3]
The highest career power–speed number belongs to Barry Bonds. Bonds had 762 career home runs and 514 career stolen bases for a career power–speed number of 613.9. Rickey Henderson is second on the career list at 490.4, followed by Willie Mays (447.1), Alex Rodriguez (410.6), Barry's father Bobby Bonds (386.0), and Joe Morgan (385.9).[4][5]
The 2012 leaders were Ryan Braun in the National League (34.6),[6] and Mike Trout in the American League (37.2).[7]
References
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