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## The Quick Player Efficiency Rating

Although basketball has been around for almost 125 years, it is a sport that is still growing when it comes to analytics. In recent years, more and more information has been pumped into players and coaches in the form of advanced statistics. One of my favorites is Player Efficiency Rating (PER), developed by John Hollinger a few years ago.

In general, the purpose of this rating is to consolidate all of a player’s bets into a single number. Using a detailed formula, Hollinger developed a system that evaluates each player’s statistical performance.

The average rating among players in the National Basketball Association is 15.0. NBA superstars are often rated in the 20s. The college and high school ratings are significantly lower than the NBA, but I’ll get to that in a moment.

The formula Hollinger uses is complicated, but I believe it gives a very accurate picture of how a player plays on the floor. So while working as an assistant coach at the collegiate level, I wanted to determine if I could find a way to evaluate a player’s performance a little faster than using the formula that Hollinger uses.

Fortunately, I do *was* find a much easier way to rate players. Although this method was easier to calculate, I found it to be very effective and accurate when it came to determining a player’s playing time and predicting who would receive year-end honors. The version of PER that I often used determined which players were more effective in certain lineups, against certain teams, and their overall positive contribution to their team.

If you are a coach, you may know that you will get a box score at quarter time or at half time. It was a time when I was busily scribbling notes to determine a player’s PER.

Let me explain.

Instead of using Hollinger’s formula. I simplified it by taking a look at a player’s positive contributions like points, rebounds, steals, assists and blocks and summing those things up. **Each positive contribution is counted as one point in the evaluation. So if a player has 15 points, 7 rebounds, 3 assists, 1 steal and 1 block, that would be a total of 27**… so far.

**I subtract the number of negative things that happen in the game. ** **So turnovers (TOs), field goals made (FGs), three-pointers missed (3pts), and free throws missed (FTs) all count as -1**. I don’t count mistakes as negative points because mistakes can be good or bad depending on the situation. Let’s say the same player shot 3-10 FGs, 3-5 FTs, 2-4 3s and also had 3 TOs, that equals a total of negative 14 (-7 for FGs, -2 FTs, -2 on 3’s, -3 on TO’s = 14).

Remember that the same player had accumulated 27 positive points. However, due to misses and turnovers, we have to subtract 14 of those points, leaving this player with an adjusted PER of 13. Inefficient players definitely suffer in this rating.

I found this quick version of PER very useful because I could do the math for each player while I was in the locker room or on the bench. By doing this rating consistently for at least one season, you can determine what the average PER would be for your type of player. You can also determine who is likely to be in line for the prize at the end of the season. You can also determine who deserves more playing time.

That’s where I found it most helpful. If a player only played a few minutes per game but had a high PER, I would favor more playing time for that player.

One might think that PER is always obvious. It is not, my friend. Sometimes you’ll see some players help you way more than hurt you, or vice versa, based on PER.

This quick PER was so useful to me when I was an assistant coach that when I became a head coach I required my assistants to use it. During my time as coach, we didn’t have numerous advanced metrics available, but this PER allowed our team to win the division championship.

As with any statistic, it must be taken in the context of the game. It is not comprehensive, just as the box score does not always accurately reflect the game. But this assessment can definitely help.

I hope it will be useful for you too. Congratulations coach!

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