Offensive Efficiency

This idea for this study came directly from the excellent blog: Tiger Tales: A Detroit Tigers Blog (follow on Twitter @tiger337). I am merely replicating what he did for the Tigers, with the Pirates.


This study looks at offensive efficiency – i.e. whether a team is scoring as many runs as it should given its total number of singles, doubles, triples, home runs, walks and other offensive events.

In order to measure efficiency I went to and copied the wRC (Weighted Runs Created) stat and the actual runs scored for each team in the National League. I subtracted wRC from Actual Runs to derive the difference; then I divided Actual Runs by wRC to get an “Efficiency Rate.”

A team is efficient offensively if their Actual Runs are even, or above wRC. It is inefficient if below.

wRC Explained

Simply put, wRC tells us how many runs should have scored based on what hitters have done at the plate. In other words, it is an estimate of runs scored, based on the totality of offensive events for each team.



The Pirates offense has been the most efficient in the National League. They have scored 10.5% more runs than they should have. Simply put, they are taking advantage of their opportunities – limited as they may be.

The other side of the of the coin is this – the Pirates “should” have scored 12 runs less than they have. As unimaginable as it is, their offense has created only 114 runs – for an average of  2.59 a game (actual average R/G 2.86). As unbelievable as it is to say, there is some truth to the statement that the Pirates have been “lucky” to score as many runs as they have.

Much thanks to Lee Panas of Tiger Tales: A Detroit Tigers Blog (follow on Twitter @tiger337) for the idea.


Thanks for stopping by.

For baseball tweets, consider following me on Twitter @highoutsideball





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