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Isolated Power 2018

Extra bases per at-bat, separating extra-base power from batting average.

Minimum workload: 3.1 plate appearances per game, rounded to the nearest whole appearance. Completed seasons use the league's scheduled regular-season game count; seasons in progress use team games played. Batting-title exceptions are not applied. Data through December 31, 2018. Data refreshed Mar 13, 2026, 3:40 AM UTC.

Isolated Power2018 season
#PlayerTeamPAABISO
1M. TroutLAA608471.316
2K. DavisOAK654576.302
3J. MartinezBOS649569.299
4M. BettsBOS614520.294
5J. GalloTEX577500.292
6J. RamírezCLE698578.282
7T. StoryCOL656598.276
8C. YelichMIL651574.272
9M. CarpenterSTL677564.266
10N. ArenadoCOL673590.264
11J. AguilarMIL566492.264
12J. BáezCHC645606.264
13N. CruzSEA591519.252
14R. HoskinsPHI660558.251
15B. HarperWSH695550.247
16A. BregmanHOU705594.246
17G. PolancoPIT535461.245
18G. StantonNYY705617.243
19E. SuárezCIN606527.243
20P. GoldschmidtAZ690593.243
21F. LindorCLE745661.242
22M. MachadoLAD709632.241
23C. CronTB560501.240
24T. ShawMIL587498.239
25X. BogaertsBOS580513.234
26M. AndujarNYY606573.230
27M. ChapmanOAK616547.230
28T. HernándezTOR523476.229
29K. SchwarberCHC510428.229
30E. EncarnaciónCLE579500.228
31A. RendonWSH597529.227
32D. GregoriusNYY569504.226
33Y. GrandalLAD518440.225
34S. PiscottyOAK605546.223
35D. PeraltaAZ614560.223
36B. NimmoNYM535433.219
37A. HicksNYY581480.219
38E. EscobarAZ631566.217
39J. SmoakTOR594505.216
40C. BlackmonCOL696626.211
41C. BellingerLAD632557.210
42J. AbreuCWS553499.208
43M. HanigerSEA683596.208
44M. MoustakasMIL635573.208
45J. RealmutoMIA531477.208
46M. OlsonOAK660580.207
47J. UptonLAA613533.206
48M. ConfortoNYM638543.204
49J. ProfarTEX594524.204
50S. PerezKC544510.204
ISO
Extra bases per at-bat, separating extra-base power from batting average.

Understanding Isolated Power

Extra bases per at-bat, separating extra-base power from batting average.

Formula: (2B + 2 × 3B + 3 × HR) ÷ AB

Read rates alongside playing time. A small sample can produce an extreme result, and a missing value is different from zero.

Season rankings use regular-season records. A player has one combined row across teams; the team label identifies the associated team, not a separate team stint.

Source: MLB statistics and MLBDB derived measures. Formulas describe the measure above. Data refreshed Mar 13, 2026, 3:40 AM UTC.