Tuesday, April 23, 2013

Effective Field Goal Percentage Breakdown

Along the same lines as my last post I decided to breakdown each teams effective field goal percentage to determine what impact shot selection and shot making abilities have on their eFG%.  To do this I determined what each teams eFG% would be if they shot at the league average in each of the 6 shooting zones from my previous post(at the rim, short range, mid range, long 2s, corner 3s and non corner 3s). I call this the average shooting eFG%.  Subtracting this number from the team's actual eFG% gives what I call the shooting factor - how much better (or worse) would their eFG% be if they were an average shooting team.  The bigger the number the better shooting team they are.  To get the shot location factor just subtract the league eFG% from the team's average shooting eFG%.  This represents how much better (or worse) than average the team is due to their shot selection.  The bigger the number the better their shot selection.  The results are below:


My last post showed that Houston and Denver were the 2 best teams at getting efficient shots.  This table shows that as well.  Both teams are in the top 7 in eFG% despite being average/below average teams at making shots.  I also talked about how OKC, Golden State and Dallas all have a good/very good eFG% despite average/poor shot selection and a possible reason why.  This table confirms that possible reason as those 3 teams have the 2nd, 6th and 5th best shot factors respectively.  Detroit is an interesting team as they have the 4th best shot selection factor but the 4th worst shooting factor.  Not surprisingly my Toronto Raptors have the 4th worst shot selection factor and a slightly above average shooting factor.

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