BP posted here lasted month about the Mets’ lack of power this season showing up primarily on the home run side, with strong performances in triples and doubles continuing to show up, and also speculated that the move from homers to other extra-base hits might be largely a function of Citi Field park effects.
In the last few weeks, as key injuries have continued to accumulate, the Mets overall power numbers have deteriorated further, and right now are looking like major league weaklings, both at home and on the road.
“Isolated Power” (ISO) is a statistic, first developed decades ago by Bill James, with a very simple formula: Slugging Percentage minus Batting Average. By deducting BA from SLG, ISO measures just that part of SLG that is derived from extra-base power — the portion of SLG that measures the ability to hit for singles is extracted, leaving just extra-base power as the quality being measured. The Mets right now are 30th, dead last, in the majors in team ISO for the 2009 season. The bottom 5 teams in the majors right now in Isolated Power:
Mets .124
A’s .125
Giants .129
Dodgers .131
Pirates .132
The 2009 major league average is .155. The current top three teams in 2009 ISO are the Rangers (.199), the Yanks (.198) and the Phils (.192)
The Mets weak performance in ISO is not limited to Citi Field. In fact, the Mets have the 28th lowest home game ISO in the majors and the 28th lowest visiting game ISO in the majors. They are the only team that is in the bottom three both home and away. At Citi, the Mets’ ISO is .131, that’s .032 below the league average for teams playing at home. Away from Citi, the Mets’ .117 ISO is .030 below the league average for teams playing on the road.
The loss of Carlos Delgado has been especially tough on the Mets’ ISO. Among over 1,700 players all-time who have accumulated at least 3,000 career MLB plate appearances, Delgado currently sits 15th in career Isolated Power, with a .266 career ISO, just behind Ralph Kiner at .269 and just ahead of David Ortiz at .262. Babe Ruth is #1 on this list with a .348 ISO, ahead of #2 Mark McGwire at .325 and #3 Barry Bonds at .309. Of the 229 players who have accumulated at least 3,000 career MLB PAs and debuted in the majors after 1991, Luis Castillo is 229th and last in career ISO, with a career ISO of .063. On that list of 229 players, Alex Cora is not far ahead of Luis, with a .100 ISO that sits 210th among those 229 players (Delgado’s .266 career ISO is 5th on this list, behind Albert Pujols at .297, Manny Ramirez at .279, and Adam Dunn and Alex Rodriguez ,each at .272).