Walker Had Isolated Power Only 15 HOFers Have Exceeded

Larry Walker, on the Hall of Fame ballot for the ninth time, has a career isolated power ranking of .252. Only 14 members of the Hall of Fame have a better isolated power ranking.

Isolated Power (ISO) is a measure of a hitter’s raw power and tells you how often a player hits for extra bases. We know that not all hits are created equally and ISO provides a quick tool for determining the degree to which a given hitter provides extra-base hits as opposed to singles. While batting average and slugging percentage each offer part of the answer, they aren’t very good at distinguishing players without being considered together, even if you know a player’s walk rate as well.

For example, a four singles and zero home runs in 10 at bats is a .400 batting average and .400 slugging percentage. One home run and zero singles in 10 at bats is a .100 batting average and .400 slugging percentage. The first player’s ISO is .000 and the second player’s ISO is .300, which tells you that the second player hits for extra bases more often. ISO doesn’t replaced a metric like OPS or wOBA, it simply helps you determine the type of player at which you’re looking.

Player Season IP
Babe Ruth 1914-1935(22) .348
Lou Gehrig 1923-1939(17) .292
Hank Greenberg 1930-1947(13) .292
Ted Williams 1939-1960(19) .289
Jimmie Foxx 1925-1945(20) .284
Jim Thome 1991-2012(22) .278
Ralph Kiner 1946-1955(10) .269
Mike Schmidt 1972-1989(18) .260
Mickey Mantle 1951-1968(18) .259
Willie Mays 1951-1973(22) .256
Joe DiMaggio 1936-1951(13) .254
Ken Griffey Jr. 1989-2010(22) .254
Frank Thomas 1990-2008(19) .254
Larry Walker 1989-2005(17) .252
Tracy RingolsbyComment