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EqAAR

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Air Advancement Runs. The number of theoretical runs contributed by a baserunner or baserunners above what would be expected given the number and quality of their baserunning opportunities. AAR is based on a multi-year Run Expectancy matrix, is park adjusted, and considers the following scenarios:

  • Runner on first with second and third unoccupied, less than two outs, a line drive, pop-up, or fly ball is caught by an outfielder
  • Runner on second but not third, less than two outs, a line drive, pop-up, or fly ball is caught by an outfielder
  • Runner on third with other bases optionally occupied, less than two outs, a line drive, pop-up, or fly ball is caught by an outfielder

Here is an example of the Air Advancement Runs spectrum based on the 2011 season:

Excellent - Alex Gordon 2.68
Great - Robinson Cano 1.21
Average - Brian Bogusevic 0.00
Poor - Yorvit Torrealba -1.43
Horrendous - Adrian Gonzalez -2.28

EqAAR appears in the following BP Glossary Categories:

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